You’ve just saved me £135!!!! Had a guy over he said he could do it for £135 😳 I was going to agree, but he was called away. I decided to look on here. IT NOW WORKS!!!!! Thank you/ Thank you/ Thank you!!! So much. Followed your video. I’m a disabled lady of 66 so you saved me a small fortune. 👏👏👏
A couple of attempts with the toaster first - but limited success. Switched to the hair dryer for 3 mins and really 'cooked' it. Was worried too much, but it all works 100% now. Thank you for the clear instructions. Fabulous!
Brilliant fix- worked a treat and saved me £85 at current prices. Didn't use any clamping, and applied hairdryer for 10 minutes till the display went entirely black. Many thanks for posting this.
Thanks! Tried this using a hairdryer and now I can see all the digits on the display again. The hardest part was getting the clear plastic cover off. But once I did that I used clothes pegs to apply pressure, used hairdryer on high for 2-3 mins, waited for display to cool down then reassembled. I had nothing to lose and was amazed when it worked. Thanks again.
Brilliant, many thanks Rod saved us a fortune. Our 927's display was totally blank but with the use of 4 bulldog clips and a hairdryer for 4 minutes on hot, held 3-4 centimetres away did the trick. One tip would be to make sure you keep an eye on the battery contacts as they can easily fall out without being noticed.
Just did this on a CM907. Used plastic pegs, and a hair dryer. Worked an absolute treat. Honestly thought I was going to have to buy a new one. Saved a fair bit of money there. Thanks. LCD 100% working correctly now.
My Honeywell display was shot. Numbers totally fragmented and in one area not showing at all.....so with nothing to lose I followed your instructions. Rod....you're a star....I must admit to being a little sceptical but I can confirm this works...Thanks a million...
Many thanks for rhis extremely helpful video. I agree with other commentators that it's a bit scary when the screen turns a purplish black, but the repair went well. Others may wish to know that I used a 1500 watt hair dryer on full heat and full blast about 4 cm away from the screen on each occasion. The first time was for 1½ minutes. A few of the digits returned to the screen but it was still pretty useless. I then played the hairdryer on it for 3½ minutes; all the digits returned except the first digit (the 10s digit) of the temperature. I played the hairdryer on it for a further 3½ minutes and even that last digit returned. Very happy and grateful. From start to finish, the procedure took me 2 hours.
a year later! it means the 4-th repair! I did heat the display in oven at T=70oC for about 10-12 mins. Woks perfectly! Thank you Handy Hawkins once again!
Sir, Your advice worked perfectly and you have saved me anywhere between £70 - £100 which is what a 7 day replacement thermostat would cost at the time of writing. Most excellent and thank you for going to the effort of making your video.
I've fixed mine before with a hairdryer, but just had to do it again after a year or two. After watching your video, I thought using the clips for pressure made sense, but I didn't have any. Instead, I folded out the LCD away from its board and placed it on a table, sandwiched between a couple of layers of tea towel. I then applied a warm iron for about a minute at a time with a fair amount of downwards pressure. Kept checking, testing, and repeating until all the segments were restored 👍
Great result ! Honeywell CM927 - three attempts, increasing the heating period until it worked (using four mini-clamps with a hairdryer at full blast, two inches away, three minutes - display turned black then blue). Now back to original display legibility, saving at least £94 for a replacement. Well done, Handy Hawkins.
Thank you very much Rod. I successfully fixed my digital screen .At first I didn't use load while heating the screen. This resulted in a half baked result! ha ha ! After adding the load and using about 1minute of heat the problem was resolved. The world should have more people like Rod. Aussie Linda
You sir are a bloody genius!! 2nd attempt with much more heat with a hairdryer worked like a charm Considering replacements are around £70 you have saved me.. Great tutorial.. excellent
This method also worked for me. I used an oven insted of a toaster. Pre-heated the oven to 100 degrees C and "baked" the screen and clips for 5 minutes before turning the oven off and leaving to cool with the oven door open. Thank you for uploading the video.
I have joined the ranks of Handy Hawkins admirers. Worked great just as shown. I was a bit timid with the heat, so some of the thinner lettering was not restored, but all the digits are back to normal. Thanks.
This is a fantastic video! It works! Thank you Handy Hawkins for showing all the fiddly bits (like putting on the plastic cover that I couldn't do first time) and how to release the unit so you can access the circuit board. Actually this was the hardest bit. My top tip in easing the circuit board off those 4 plastic clips without them pinging back was to shove plastic covered paper clips under them once I had released one corner. I used the toaster, left it on for quite a while and the lamination turned black, but it is all fine now. I am a total novice, but feel empowered now to take on more repairs around the home. Thank you!
30.08.2022 - Another year, another repair... of the same thermostat Honeywell!!! Today I used 90 degrees C for 10 min in the oven. It works perfect! Thank you Handy Hawkins once more!
Thanks Mr Hawkins! 7 minutes in the oven (at 135 degrees Celsius) clipped with 12 clothespins did the trick for me. All the buttons are also fully working again.
Fantastic! I was worried I'd have to buy a new controller and base station to connect to the boiler - spent ages looking for bad contacts to the LCD and then found your video - some bulldog clips and the hair dryer and it's fixed! I didn't even know LCDs could de-laminate. Thanks so much for posting.
Big thanks for posting this. You haved me £130! :) Also, I didn't bother taking it apart. Just held it upside down and used a hair dryer, 2 inches away from the screen for about 5 minutes. Then left to cool for 1 hour. It works perfectly!
Excellent video! Was a bit to careful with the heating the first time, then again with longer föhn and a little closer, with success. Professor Hawkins has made me Euro 139.- happy! In addition the psychological lift I get from achieving something technical. (I am 86).
Thank you very much Handy. I really thought it was a joke, as I thought it was pretty fantastic that just heat could repair an LCD. I tried it with the toaster and it didn't work. I have seen the comments where it was said that with a hairdryer it could be done as well, with the advantage that you could see when the screen went totally black. I have done it this way and it WORKS !!!!
Thanks for the handy video. I’ve had this issue a couple of times now. I fixed it a couple of years ago following a different tutorial, which worked well enough - but this time round I found your video. So a couple of comments if I may.... Firstly the fault isn’t a delamination of the screen; the fault is the ribbon cable attaching the screen to the circuit board is glued in place, and it is this glue that fails, allowing just partial signals to reach the screen from the circuit board. This was something I learned from the original tutorial I used; however, that tutorial had me separating the ribbon cable and re-aligning it, so was a lot of work! Your method cures the problem just fine - it’s just the root cause you’ve identified is not quite correct - but the end result works, which at the end of the day is what matters. So a slightly simpler method , and knowing what I did about the actual cause, is the method I used . Simply clamp the edge of the screen that the ribbon cable is attached to - it’s very obvious when you have the components disassembled. No need to clamp all the way around the screen. I then used a heat gun (appreciate not everyone has one), and heated the area around the ribbon cable (as others have noted the screen itself may well go dark, but it does recover). Keep the clamps in place for a minute while the glue re-sets. Job done ! We have two of these thermostats (one controls upstairs, the other, downstairs) and they both exhibited the missing letters/numerals - both are once again fixed with just 5 minutes work.
My tip for everyone... I used a hairdryer with the bulldog clips. But actually first time I didn’t get it hot enough. Actually had to get the glass front really hot on mine. To the point I def couldn’t touch it with bare fingers. Way more than 30 seconds on top heat of hair dryer. Screen went dark in places. Worried bout ruining. When done I took bulldog clips off and with some kitchen roll between my fingers and the screen/back, I massaged it hard until it was cold... because I figured you have to keep pressing until cold otherwise will detach again. Bingo. Worked perfectly. So don’t be scared of full hairdryer heat, half inch from screen, two minutes
I agree that this is a brilliant video, but that 20 seconds was not enough, so, believing that this method did not work, I followed the advice here (but using a hair dryer instead of a heat gun). You don't need to be able to read Spanish for this video to be helpful - use Handy Hawkins for disassembly and reassembly, and if necessary, use this one for the middle bit. Note that you don't need to attach it to the wall to see if it works - once the mother board is (half) in to the outer plastic (at the bottom), insert the batteries and see if it works. ua-cam.com/video/W4LxHn5Y_l4/v-deo.html
This comment just saved us. Dont be afraid of really heating it up. We just did it with a hairdryer. I would say roughly 90 seconds of full blast. Needed 5 minutes to cool down. It's working again!
Agree with all the comments. First attempt, I gently heated it with a hair dryer for 30 seconds conscious I was going to make the LCD bleed, put it all back together and there was no change. Took it out again, applied the highest setting on the hair dryer for two minutes about an inch from the screen. Couldn't touch the clips or screen afterwards as it was too hot to handle. I didn't massage it, but let it cool on it's own. After about 5 minutes, re-assembled it all and worked a treat.
Thank you *Handy Hawkins* for the Video I used Handy Hawkins instructions for disassembly and reassembly, and thank you Martin, Tim, Dieter and John, for your replies, I used the hair dryer as you advised. I managed to get the display back on the screen , on the second attempt, Mine was the Honeywell Thermostat CM927 which *Honeywell* do not make any more! The thermostat was showing a higher reading than it supposed to, a blast from an Air Duster, on the mother board, brought the displayed Room Temperature to the correct level.
Thanks Handy. I used a heat gun, sandwiched it between two pieces of hard plastic and a small furniture clamp to apply the pressure. It now appears to be working again. I love fixing things!
I’ve used this video today to resurrect my display. Used a hairdryer as opposed to toaster, saw an improvement on first attempt then fully resolved on second attempt. Don’t be afraid to get it hot. Thanks for the share saw the description of this process in a forum but a video is much better.
Thank you with all my heart, I followed your instructions, and saved me a very dear piece of gym equipment, that never worked properly. YOU ARE THE BEST.
Brilliant! I did both of mine today. I used a heat gun for the heat source (for paint stripping) and held it above until it gradually turned slightly darker. I was a little concerned if I'd overcooked it, but fortunately it worked perfectly with both. I followed each bit step by step. Thank you very much.
This just worked. I have a cm907, i couldn't read anything. I tried 3 times with minor improvement, than the last round i heated up the lcd with a hairdryer until it was black, then applied some pressure and voila, just like new. Big thanks for sharing!
Thanks worked for me, the toaster part didn't work, but 7mins in the oven @ 90 degrees did the trick. It's as good as new now! Seems you've saved a lot of people a lot of money!
Thank you so much. We have zero electronics experience, and managed to fix our Honeywell CM927 with these really helpful and clear instructions. Saved us £130 on a new unit!
My first CM927, fitted in 2012, lasted 4 years before the LCD screen gave up the ghost. Bought a second one and guess what- That one also lasted for 4 years. I have just followed your repair video and although the first unit which had been in my garage for the last 4 years, when battried, had a completely blank screen, it is now working fine with all the characters as clear and as good as new. The only thing I did different was after I removed the pressure clamps I continued to apply heat with the hair dryer direct to the screen at the same time applying medium pressure to all parts of the screen with the rounded wooden handle of a bradawl. Will fix the second one now and have a spare. Thanks H.H.
Wow that was so easy! I did it with a hair pin, 5 tiny bulldog clips and then used hairdryer until it went black. Whole repair took 15 minutes. Saved me 200 quid. Thanks Mister!
Legend, this helped me out too. 6 clothespins and a heatgun did the trick. Just heat to the point where the LCD becomes uniformly dark, then stop and let cool down. You get 5* from me buddy 🙂
Awesome hack worked a treat. £130 saved. I gave my circuit board a spray with contact cleaner light toothbrush dust while it was all opened up. Thanks.
Wow, you're a legend - I tried 2 times with the toaster, no joy, BUT then read the post that said hairdryer for 2m30 so i went for it...screen went mega dark, waited for it to cool and hey presto....got all the numbers back....FAB i can now programme it properly, great tutorial by the way, simple steps, (i knew my A Level in electronics would come in handy one day) LOL
Cheers mate. Been gradually losing parts of my display over the last few years and this fixed it. I don’t have a toaster so used a hairdryer for two minutes.
Thank you. The hardest part of this job is getting the thing off the wall. I put the lcd unit clamped up in a fan oven at the lowest heat setting for 10 minutes and then let it cool, the result was a display working perfectly.
It worked for me on a Digistat+3RF. This video Saved me hundreds of pounds. Very happy. Please do more videos and great ideas like this. Thank you one more time.
Thank you for the video. This is third time I repaired my thermostat! And it works again! Great help. But this time did heating in the oven. Than you everybody who added their experience! And my husband was much impress by "my skill" in electronics...
Great results, thank you. I used the toaster and checked surface temp of LCD as I went. 55 Deg C didn't improve thing. Tried again and got temp to just over 70 Deg C and all fixed.
Fantastic! Have the slightly more complicated version £175. Took 10 minutes to take apart and back together. Display was completely unreadable now crystal clear. Many Thanks
This is just awesome! Most of my DIY attempts fail miserably so to do something that works and saves me a few quid is fantastic! Thanks for posting this!! Brilliant!!!
So much thanks from the Netherlands. Especially in these times it saved me good money. Used the bread toaster. Got bit scared I did to long as the screen got some dark but after cooling down. Works like a glove 🎉🎉
Just followed this. Failed first two attempts. However, got a bit more bold with heat on third ago and now working good as new. Saved a good few quid. Ta very much.
After a few attempts with hairdryer and pegs, now working perfectly after finding some bulldog clips and holding it over the toaster. Thank you so much!
Thank you - worked on my 927 even though I made some modification to the process. I used hairdryer and clothespins - maximum heat for about 4 minutes, distance under 4 centimetres. The results may not be perfect but still, all the character are readable.
8 років тому
I have a CM907. Many many thanks. The solution really works. It's fantastic. I've saved up buying another thermostat
Thank you so much. Heated with a heat gun used for hobby purposes. Worked great. So I used a small piece of balsa like 1mm thick to make sure to compress the ribbon contact strip against the LCD display. This worked great.
Brilliant. Thanks for the excellent video. I used a hairdryer. Heated quite gently at first - didn't work. Tried again with more heat - still no. Tried again, this time heating it up much more in a kill or cure attempt - great. It now works perfectly.
Thank you for a great video! Just wanted to share something i found whilst taking mine apart, the battery contact to the circuit board had fured up but gave the same fault as a delaminated screen. You still have to remove the circuit board to clean the contact, just wanted to share incase anyone else had the same fault.
Thank you so much. My Honeywell thermostat is quite old, & the display has been largely illegible for some time. This morning I decided rather impulsively to have a go at fixing it. It took a lot of fiddling, & I hadn’t got bulldog clips so had to use plastic pegs. Wasn’t sure it would work, especially as they kept slipping off causing me to drop it a couple of times! There were a few scary moments like this, such as when I couldn’t figure which bit went where. But I watched & rewatched your video & got there in the end. The first time it didn’t work, but the second time, bingo! The display is now 99% perfect, the numbers 100%, with just a couple of the letters with bits missing. It will do fine. It might interest you to know I’m an elderly woman, & although when younger I did a lot of diy through necessity, I won’t say I had a natural ability. So thanks again, Sunday morning gone but worth it.
Great. Two unsuccessful toaster trials but then first airdryer run worked perfectly (and is safer without the danger of overheating the thermo). Congratulations to Mr Hawkins for his initiative to share this. In particular great for more sustainability: repairing poorly designed products such as this Honeywell thermostat safes the environment, not only our wallets ! A malfunctioning device due to a quick-to-fix issue is unsustainable and unacceptable. Shame on companies like Honeywell who sell malfunctioning devices like this CM901-907 thermostats.
I have CM907. I tried first 30 seconds above quite powerfull toaster but was not sufficient. When I tried it for 2 minutes it got much better with digits but then I tried 2:30 and realized that screen got purple black completely with one darker place (ellipse). When it was cooling down I thought the light ellipse will be overheated area of the display but after several minutes it disappeared. Now it working like a brand new device!!! Thank a lot from the Czech Rep. (saved me 1500 CZK).
Thank you so much. My Honeywell thermostat is quite old & the display has been largely illegible for some time. It communicated with boiler ok, but was getting impossible to programme as I couldn’t really read the digits/ letters adequately. So rather impulsively I decided to bite the bullet. Hadn’t got metal bulldog clips so had to use plastic pegs which weren’t very secure, wasn’t sure it would work, especially as they didn’t hold it well , causing me to drop it a couple of times! It took a lot of fiddling, & a couple of scares when I couldn’t figure things out. But I doggedly watched & rewatched your video, first time didn’t work, but second time, bingo! It’s not quite perfect, the digits are all fine but a couple of the letters are incomplete. But it’s hugely better, & that will do for me. It might interest you to know I’m an elderly woman, & although years ago I did a lot of DIY through necessity I won’t say I had a natural talent for it. It’s taken all Sunday morning but it was worth it. Thanks again.
Thank you, most of my digits had part of them missing. Tried the first time and failed. Re did with pegs and keeping the heat on a bit longer. Now looks like new and still works !
Great fix! Took three goes for it to work for me using a hairdryer. That was mainly an issue with me panicking when the screen started going black. As per other comments, it needs to do this for the screen to re-bond. Thanks mate.
I had no clips or a toaster either, so I heated the LCD using a hot air station and then immediately applied strong pressure. 99% of the screen is working now. Thank you for sharing.
Handy, you save my life!! my husband and I was baking inside the house 28, and my husband was shouting if me like a bambi because I put on and this fucking control stopped working! Well my husband is a welder but couldn’t fix it! Well I found you video here and I fix it myself!! Thank you so much now is working!💪🏻💪🏻
thanks a million - didn't work with a hairdryer, but second try did the job perfectly over a toaster with my 927 - saved me a small fortune - cheers chap!
Excellent video - thanks!! - Initially I tried with a hair dryer on full heat for 25 seconds or so, but realised after powering back on it was the screen areas that had gone dark shade of green/black that worked, so repeated and waited for the entire screen to change to the same colour, I used 6 wooden pegs to apply the pressure for re-lamination. thanks again!
Thanks so much! I have a CM927, where the contact ribbon is just along the top edge of the LCD (maybe they're all like that), so that's where I applied most of the pressure, after warming with a hairdryer. Worked like a dream!
Thanks very much this has also worked for me. Used hairdryer for approx 2 mins and agree with other posts that you need to allow the LCD to blacken to ensure its bonded enough. Also I found it tricky removing the screen from its plastic cover as very tight fitting, so take care with this. Otherwise excellent fix - thanks again!
Followed your instructions and worked great for my cm927. Thanks very much for sharing this video, I didn't realise LCD screens could de-laminate. Good to know.
Thanks for the fantastic video! My display was missing half the numbers so you were unable to read it. Needed to heat it up twice over the toaster and is now good as new. Cheers Rod 👍🏻
Worked really well, cheers mate! Didn't expect it, rather laughed when you started going on about the toaster. But it worked! Didn't have clips, pressure didn't seem necessary; just the heat was fine. One tip for future videos: the crux of the solution was a few minutes in, might be nice if you started out with that simple tip.
Rod, have to say a big thanks for sharing your video. I used a hairdryer on our thermostat following your instructions and was totally amazed at it actually working, you've saved me £90. I'd buy you a pint if I was close lol🍻🍻 cheers mate
Hi Rod, thank you very much for your very informative video my unit is a different model to yours but basically the same, I followed your instructions to the letter but the only difference I made was I had to give the LCD a longer heat period, I also kept moving it across the top of the toaster rather than have it stationary, I was so worried about damaging the unit, after about one minute of waving it across the heat plume from the toaster I stopped and let it cool completely down, put it back together and the display is working perfectly, again thank you very much for taking the time to share your knowledge with us, all the best Martin.
Thanks! Worked like a charm! My display started to fade in the room temperature zone, (only) after 5 years after installation. This Dutch guy has a good weekend thanks to Handy Hawkins.. PS used the hair dryer method, after dismounting. :-)
Thanks Rod - really helpful. I had no characters at all. Ended up with Dyson hairdryer on full heat for 2min 30sec at really close range and it sorted it with all characters visible if one or two bars still missing. (tried shorter time and tried toaster before). Now a fully functional CM927. Great result. Thanks for sharing and for your clarity of instruction.
Thanks for this. Worked for me. Did as you explained, and put it above my toaster for 20secs, but that didn't work. Tried again but then let it on the toaster for +1min, screen turned completely black and then let it cool down and saw the black blotches disappear. Works fine now.
Thanks - it worked a treat. Had to heat it up a few times and apply press to get all the digits back probably due my toaster not being as hot. Saved £ and plastic waste - very happy!
You’ve just saved me £135!!!! Had a guy over he said he could do it for £135 😳 I was going to agree, but he was called away. I decided to look on here. IT NOW WORKS!!!!! Thank you/ Thank you/ Thank you!!! So much. Followed your video. I’m a disabled lady of 66 so you saved me a small fortune. 👏👏👏
A couple of attempts with the toaster first - but limited success. Switched to the hair dryer for 3 mins and really 'cooked' it. Was worried too much, but it all works 100% now. Thank you for the clear instructions. Fabulous!
Brilliant fix- worked a treat and saved me £85 at current prices.
Didn't use any clamping, and applied hairdryer for 10 minutes till the display went entirely black.
Many thanks for posting this.
Thanks! Tried this using a hairdryer and now I can see all the digits on the display again. The hardest part was getting the clear plastic cover off. But once I did that I used clothes pegs to apply pressure, used hairdryer on high for 2-3 mins, waited for display to cool down then reassembled. I had nothing to lose and was amazed when it worked. Thanks again.
Brilliant, many thanks Rod saved us a fortune. Our 927's display was totally blank but with the use of 4 bulldog clips and a hairdryer for 4 minutes on hot, held 3-4 centimetres away did the trick. One tip would be to make sure you keep an eye on the battery contacts as they can easily fall out without being noticed.
Just did this on a CM907. Used plastic pegs, and a hair dryer. Worked an absolute treat. Honestly thought I was going to have to buy a new one. Saved a fair bit of money there. Thanks. LCD 100% working correctly now.
My Honeywell display was shot. Numbers totally fragmented and in one area not showing at all.....so with nothing to lose I followed your instructions. Rod....you're a star....I must admit to being a little sceptical but I can confirm this works...Thanks a million...
Many thanks for rhis extremely helpful video. I agree with other commentators that it's a bit scary when the screen turns a purplish black, but the repair went well. Others may wish to know that I used a 1500 watt hair dryer on full heat and full blast about 4 cm away from the screen on each occasion. The first time was for 1½ minutes. A few of the digits returned to the screen but it was still pretty useless. I then played the hairdryer on it for 3½ minutes; all the digits returned except the first digit (the 10s digit) of the temperature. I played the hairdryer on it for a further 3½ minutes and even that last digit returned. Very happy and grateful. From start to finish, the procedure took me 2 hours.
a year later! it means the 4-th repair! I did heat the display in oven at T=70oC for about 10-12 mins. Woks perfectly! Thank you Handy Hawkins once again!
Sir,
Your advice worked perfectly and you have saved me anywhere between £70 - £100 which is what a 7 day replacement thermostat would cost at the time of writing. Most excellent and thank you for going to the effort of making your video.
I've fixed mine before with a hairdryer, but just had to do it again after a year or two. After watching your video, I thought using the clips for pressure made sense, but I didn't have any. Instead, I folded out the LCD away from its board and placed it on a table, sandwiched between a couple of layers of tea towel. I then applied a warm iron for about a minute at a time with a fair amount of downwards pressure. Kept checking, testing, and repeating until all the segments were restored 👍
One of the best hacks I’ve found for anything! Thank you from Australia, fixed mine last night and now all good thanks to this 👍
Great result ! Honeywell CM927 - three attempts, increasing the heating period until it worked (using four mini-clamps with a hairdryer at full blast, two inches away, three minutes - display turned black then blue). Now back to original display legibility, saving at least £94 for a replacement. Well done, Handy Hawkins.
Thank you very much Rod. I successfully fixed my digital screen .At first I didn't use load while heating the screen. This resulted in a half baked result! ha ha ! After adding the load and using about 1minute of heat the problem was resolved.
The world should have more people like Rod.
Aussie Linda
You sir are a bloody genius!!
2nd attempt with much more heat with a hairdryer worked like a charm
Considering replacements are around £70 you have saved me..
Great tutorial.. excellent
This method also worked for me. I used an oven insted of a toaster. Pre-heated the oven to 100 degrees C and "baked" the screen and clips for 5 minutes before turning the oven off and leaving to cool with the oven door open.
Thank you for uploading the video.
I have joined the ranks of Handy Hawkins admirers. Worked great just as shown. I was a bit timid with the heat, so some of the thinner lettering was not restored, but all the digits are back to normal. Thanks.
This is a fantastic video! It works! Thank you Handy Hawkins for showing all the fiddly bits (like putting on the plastic cover that I couldn't do first time) and how to release the unit so you can access the circuit board. Actually this was the hardest bit. My top tip in easing the circuit board off those 4 plastic clips without them pinging back was to shove plastic covered paper clips under them once I had released one corner. I used the toaster, left it on for quite a while and the lamination turned black, but it is all fine now. I am a total novice, but feel empowered now to take on more repairs around the home. Thank you!
30.08.2022 - Another year, another repair... of the same thermostat Honeywell!!! Today I used 90 degrees C for 10 min in the oven. It works perfect! Thank you Handy Hawkins once more!
Thanks Mr Hawkins! 7 minutes in the oven (at 135 degrees Celsius) clipped with 12 clothespins did the trick for me. All the buttons are also fully working again.
Fantastic! I was worried I'd have to buy a new controller and base station to connect to the boiler - spent ages looking for bad contacts to the LCD and then found your video - some bulldog clips and the hair dryer and it's fixed! I didn't even know LCDs could de-laminate. Thanks so much for posting.
Big thanks for posting this. You haved me £130! :) Also, I didn't bother taking it apart. Just held it upside down and used a hair dryer, 2 inches away from the screen for about 5 minutes. Then left to cool for 1 hour. It works perfectly!
Excellent video! Was a bit to careful with the heating the first time, then again with longer föhn and a little closer, with success. Professor Hawkins has made me Euro 139.- happy! In addition the psychological lift I get from achieving something technical. (I am 86).
Thank you very much Handy.
I really thought it was a joke, as I thought it was pretty fantastic that just heat could repair an LCD.
I tried it with the toaster and it didn't work. I have seen the comments where it was said that with a hairdryer it could be done as well, with the advantage that you could see when the screen went totally black. I have done it this way and it WORKS !!!!
You are an absolute legend. I've just fixed a 15 year old CM927 by following your instructions and saved myself €€€. I'd like to buy you a beer.
Thanks for the handy video.
I’ve had this issue a couple of times now. I fixed it a couple of years ago following a different tutorial, which worked well enough - but this time round I found your video. So a couple of comments if I may....
Firstly the fault isn’t a delamination of the screen; the fault is the ribbon cable attaching the screen to the circuit board is glued in place, and it is this glue that fails, allowing just partial signals to reach the screen from the circuit board. This was something I learned from the original tutorial I used; however, that tutorial had me separating the ribbon cable and re-aligning it, so was a lot of work!
Your method cures the problem just fine - it’s just the root cause you’ve identified is not quite correct - but the end result works, which at the end of the day is what matters.
So a slightly simpler method , and knowing what I did about the actual cause, is the method I used . Simply clamp the edge of the screen that the ribbon cable is attached to - it’s very obvious when you have the components disassembled. No need to clamp all the way around the screen.
I then used a heat gun (appreciate not everyone has one), and heated the area around the ribbon cable (as others have noted the screen itself may well go dark, but it does recover). Keep the clamps in place for a minute while the glue re-sets. Job done !
We have two of these thermostats (one controls upstairs, the other, downstairs) and they both exhibited the missing letters/numerals - both are once again fixed with just 5 minutes work.
Agree with you. Makes sense.
Mr H, you are a genius! Just fixed my faulty screen in 15 minutes and at no cost 👍
My tip for everyone... I used a hairdryer with the bulldog clips. But actually first time I didn’t get it hot enough. Actually had to get the glass front really hot on mine. To the point I def couldn’t touch it with bare fingers. Way more than 30 seconds on top heat of hair dryer. Screen went dark in places. Worried bout ruining. When done I took bulldog clips off and with some kitchen roll between my fingers and the screen/back, I massaged it hard until it was cold... because I figured you have to keep pressing until cold otherwise will detach again. Bingo. Worked perfectly. So don’t be scared of full hairdryer heat, half inch from screen, two minutes
I agree that this is a brilliant video, but that 20 seconds was not enough, so, believing that this method did not work, I followed the advice here (but using a hair dryer instead of a heat gun). You don't need to be able to read Spanish for this video to be helpful - use Handy Hawkins for disassembly and reassembly, and if necessary, use this one for the middle bit. Note that you don't need to attach it to the wall to see if it works - once the mother board is (half) in to the outer plastic (at the bottom), insert the batteries and see if it works. ua-cam.com/video/W4LxHn5Y_l4/v-deo.html
This comment just saved us. Dont be afraid of really heating it up. We just did it with a hairdryer. I would say roughly 90 seconds of full blast. Needed 5 minutes to cool down.
It's working again!
Agree with all the comments. First attempt, I gently heated it with a hair dryer for 30 seconds conscious I was going to make the LCD bleed, put it all back together and there was no change. Took it out again, applied the highest setting on the hair dryer for two minutes about an inch from the screen. Couldn't touch the clips or screen afterwards as it was too hot to handle. I didn't massage it, but let it cool on it's own. After about 5 minutes, re-assembled it all and worked a treat.
Thank you *Handy Hawkins* for the Video I used Handy Hawkins instructions for disassembly and reassembly, and thank you Martin, Tim, Dieter and John, for your replies, I used the hair dryer as you advised. I managed to get the display back on the screen , on the second attempt, Mine was the Honeywell Thermostat CM927 which *Honeywell* do not make any more!
The thermostat was showing a higher reading than it supposed to, a blast from an Air Duster, on the mother board, brought the displayed Room Temperature to the correct level.
Thanks Handy. I used a heat gun, sandwiched it between two pieces of hard plastic and a small furniture clamp to apply the pressure. It now appears to be working again. I love fixing things!
Really impressed, two minutes on the glass after following the instructions, and now working perfectly. Thanks for the video.
Just done mine, thanks for the information. I used a hairdryer till the screen went dark, left it to cool & bingo! Good as new. Excellent stuff
I’ve used this video today to resurrect my display. Used a hairdryer as opposed to toaster, saw an improvement on first attempt then fully resolved on second attempt. Don’t be afraid to get it hot. Thanks for the share saw the description of this process in a forum but a video is much better.
Thank you with all my heart, I followed your instructions, and saved me a very dear piece of gym equipment, that never worked properly. YOU ARE THE BEST.
Just done this repair only took 5 mins... screen back to normal.. Many thanks... a saving of £120.....
Brilliant! I did both of mine today. I used a heat gun for the heat source (for paint stripping) and held it above until it gradually turned slightly darker. I was a little concerned if I'd overcooked it, but fortunately it worked perfectly with both. I followed each bit step by step. Thank you very much.
This just worked. I have a cm907, i couldn't read anything. I tried 3 times with minor improvement, than the last round i heated up the lcd with a hairdryer until it was black, then applied some pressure and voila, just like new. Big thanks for sharing!
Thanks worked for me, the toaster part didn't work, but 7mins in the oven @ 90 degrees did the trick. It's as good as new now! Seems you've saved a lot of people a lot of money!
Thank you so much. We have zero electronics experience, and managed to fix our Honeywell CM927 with these really helpful and clear instructions. Saved us £130 on a new unit!
Done it with a hairdryer for no more than 3 minutes. Worked a dream! Was about to go out and buy a new one! Thanks so much!
My first CM927, fitted in 2012, lasted 4 years before the LCD screen gave up the ghost. Bought a second one and guess what- That one also lasted for 4 years. I have just followed your repair video and although the first unit which had been in my garage for the last 4 years, when battried, had a completely blank screen, it is now working fine with all the characters as clear and as good as new. The only thing I did different was after I removed the pressure clamps I continued to apply heat with the hair dryer direct to the screen at the same time applying medium pressure to all parts of the screen with the rounded wooden handle of a bradawl.
Will fix the second one now and have a spare. Thanks H.H.
Wow that was so easy! I did it with a hair pin, 5 tiny bulldog clips and then used hairdryer until it went black. Whole repair took 15 minutes. Saved me 200 quid. Thanks Mister!
Ho seguito la tua procedura anche sul mio termostato ed ha funzionato! Sei un grande. Grazie mille. Mi hai fatto risparmiare 90€
Legend, this helped me out too. 6 clothespins and a heatgun did the trick. Just heat to the point where the LCD becomes uniformly dark, then stop and let cool down.
You get 5* from me buddy 🙂
Awesome hack worked a treat. £130 saved. I gave my circuit board a spray with contact cleaner light toothbrush dust while it was all opened up. Thanks.
Wow, you're a legend - I tried 2 times with the toaster, no joy, BUT then read the post that said hairdryer for 2m30 so i went for it...screen went mega dark, waited for it to cool and hey presto....got all the numbers back....FAB i can now programme it properly, great tutorial by the way, simple steps, (i knew my A Level in electronics would come in handy one day) LOL
Absolute legend, same stat, I didn't have bulldog clips so used plastic clothe line pegs and a hair dryer, it still worked a treat. Thank you.
Cheers mate. Been gradually losing parts of my display over the last few years and this fixed it. I don’t have a toaster so used a hairdryer for two minutes.
Thank you. The hardest part of this job is getting the thing off the wall. I put the lcd unit clamped up in a fan oven at the lowest heat setting for 10 minutes and then let it cool, the result was a display working perfectly.
It worked for me on a Digistat+3RF. This video Saved me hundreds of pounds. Very happy. Please do more videos and great ideas like this.
Thank you one more time.
Thank you for the video. This is third time I repaired my thermostat! And it works again! Great help. But this time did heating in the oven. Than you everybody who added their experience! And my husband was much impress by "my skill" in electronics...
Great results, thank you. I used the toaster and checked surface temp of LCD as I went. 55 Deg C didn't improve thing. Tried again and got temp to just over 70 Deg C and all fixed.
Fantastic! Have the slightly more complicated version £175. Took 10 minutes to take apart and back together. Display was completely unreadable now crystal clear. Many Thanks
This is just awesome! Most of my DIY attempts fail miserably so to do something that works and saves me a few quid is fantastic! Thanks for posting this!! Brilliant!!!
Thank you Rod! It works perfect! I tried with an iron on “cotton” preset. First 2 time 2minutes, not 100%. 3th trie 4,5minutes and worked perfect.
Wow 226 people had this fault! Many thanks worked and shared with residents association as we all have these!! Need silica gel yes as winter is coming
4 minutes with a hairdryer and now perfect. Brilliant! Many thanks.
THANKYOU SOOOO MUCH !! I HAVE JUST WATCHED YOUR VIDEO AND SORTED OUR CM927 THERMO STAT, 30 MINS OF WORK AND A FAIR FEW QUID SAVED 👍
So much thanks from the Netherlands. Especially in these times it saved me good money. Used the bread toaster. Got bit scared I did to long as the screen got some dark but after cooling down. Works like a glove 🎉🎉
Just followed this. Failed first two attempts. However, got a bit more bold with heat on third ago and now working good as new. Saved a good few quid. Ta very much.
Just did above repair on a cm927..brilliant. Thanks saved me over £100.
After a few attempts with hairdryer and pegs, now working perfectly after finding some bulldog clips and holding it over the toaster. Thank you so much!
Just followed this tutorial and even I managed to repair our thermostat! Thanks so much for posting the advice Rod.
Rod, Brilliant, many thanks. Worked first time on my CM927 using exactly your process and toaster.
Thank you - worked on my 927 even though I made some modification to the process.
I used hairdryer and clothespins - maximum heat for about 4 minutes, distance under 4 centimetres.
The results may not be perfect but still, all the character are readable.
I have a CM907.
Many many thanks. The solution really works. It's fantastic. I've saved up buying another thermostat
Thank you so much. Heated with a heat gun used for hobby purposes. Worked great. So I used a small piece of balsa like 1mm thick to make sure to compress the ribbon contact strip against the LCD display. This worked great.
Brilliant. Thanks for the excellent video. I used a hairdryer. Heated quite gently at first - didn't work. Tried again with more heat - still no. Tried again, this time heating it up much more in a kill or cure attempt - great. It now works perfectly.
Thank you for a great video! Just wanted to share something i found whilst taking mine apart, the battery contact to the circuit board had fured up but gave the same fault as a delaminated screen. You still have to remove the circuit board to clean the contact, just wanted to share incase anyone else had the same fault.
Thank you so much. My Honeywell thermostat is quite old, & the display has been largely illegible for some time. This morning I decided rather impulsively to have a go at fixing it. It took a lot of fiddling, & I hadn’t got bulldog clips so had to use plastic pegs. Wasn’t sure it would work, especially as they kept slipping off causing me to drop it a couple of times! There were a few scary moments like this, such as when I couldn’t figure which bit went where. But I watched & rewatched your video & got there in the end. The first time it didn’t work, but the second time, bingo!
The display is now 99% perfect, the numbers 100%, with just a couple of the letters with bits missing. It will do fine.
It might interest you to know I’m an elderly woman, & although when younger I did a lot of diy through necessity, I won’t say I had a natural ability.
So thanks again, Sunday morning gone but worth it.
Great. Two unsuccessful toaster trials but then first airdryer run worked perfectly (and is safer without the danger of overheating the thermo). Congratulations to Mr Hawkins for his initiative to share this. In particular great for more sustainability: repairing poorly designed products such as this Honeywell thermostat safes the environment, not only our wallets !
A malfunctioning device due to a quick-to-fix issue is unsustainable and unacceptable. Shame on companies like Honeywell who sell malfunctioning devices like this CM901-907 thermostats.
Just a message to show my appreciation for your video. Many thanks for helping me fix the exact same issue.
I have CM907. I tried first 30 seconds above quite powerfull toaster but was not sufficient. When I tried it for 2 minutes it got much better with digits but then I tried 2:30 and realized that screen got purple black completely with one darker place (ellipse). When it was cooling down I thought the light ellipse will be overheated area of the display but after several minutes it disappeared. Now it working like a brand new device!!! Thank a lot from the Czech Rep. (saved me 1500 CZK).
Thank you so much. My Honeywell thermostat is quite old & the display has been largely illegible for some time. It communicated with boiler ok, but was getting impossible to programme as I couldn’t really read the digits/ letters adequately. So rather impulsively I decided to bite the bullet. Hadn’t got metal bulldog clips so had to use plastic pegs which weren’t very secure, wasn’t sure it would work, especially as they didn’t hold it well , causing me to drop it a couple of times! It took a lot of fiddling, & a couple of scares when I couldn’t figure things out. But I doggedly watched & rewatched your video, first time didn’t work, but second time, bingo!
It’s not quite perfect, the digits are all fine but a couple of the letters are incomplete. But it’s hugely better, & that will do for me.
It might interest you to know I’m an elderly woman, & although years ago I did a lot of DIY through necessity I won’t say I had a natural talent for it.
It’s taken all Sunday morning but it was worth it. Thanks again.
pat horrocks ".
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Thank you, most of my digits had part of them missing. Tried the first time and failed. Re did with pegs and keeping the heat on a bit longer. Now looks like new and still works !
Great fix! Took three goes for it to work for me using a hairdryer. That was mainly an issue with me panicking when the screen started going black. As per other comments, it needs to do this for the screen to re-bond. Thanks mate.
I had no clips or a toaster either, so I heated the LCD using a hot air station and then immediately applied strong pressure. 99% of the screen is working now. Thank you for sharing.
Handy, you save my life!! my husband and I was baking inside the house 28, and my husband was shouting if me like a bambi because I put on and this fucking control stopped working! Well my husband is a welder but couldn’t fix it! Well I found you video here and I fix it myself!! Thank you so much now is working!💪🏻💪🏻
thanks a million - didn't work with a hairdryer, but second try did the job perfectly over a toaster with my 927 - saved me a small fortune - cheers chap!
Excellent video - thanks!! - Initially I tried with a hair dryer on full heat for 25 seconds or so, but realised after powering back on it was the screen areas that had gone dark shade of green/black that worked, so repeated and waited for the entire screen to change to the same colour, I used 6 wooden pegs to apply the pressure for re-lamination. thanks again!
Worked a treat on my CM921. All working correctly. Many many thanks. Brilliant advice
Thanks a lot, I used a hairdryer for 5 minutes. My thermostat is as good as new! Great video, very well explained and demonstrated.
Thanks so much! I have a CM927, where the contact ribbon is just along the top edge of the LCD (maybe they're all like that), so that's where I applied most of the pressure, after warming with a hairdryer. Worked like a dream!
Thanks a lot! Worked well on my CM927. Used a hair dryer on max temperature and air flow for 3 minutes, until the screen had gone completely black.
Success! Thank you - worked a dream. 6 year old unit, 2 minutes over the toaster, LCD display heated until black. Back to working order!
Thanks very much this has also worked for me. Used hairdryer for approx 2 mins and agree with other posts that you need to allow the LCD to blacken to ensure its bonded enough. Also I found it tricky removing the screen from its plastic cover as very tight fitting, so take care with this. Otherwise excellent fix - thanks again!
Followed your instructions and worked great for my cm927. Thanks very much for sharing this video, I didn't realise LCD screens could de-laminate. Good to know.
Thanks for the fantastic video! My display was missing half the numbers so you were unable to read it. Needed to heat it up twice over the toaster and is now good as new. Cheers Rod 👍🏻
Hi. Thanks for the video. I used a hot air gun (gently). Took two attempts and done! Looks and works perfectly now.
Yes this works really well. Recovered my lost display at first attempt. Used clips and a hair-dryer. Thanks very much for sharing this.
Thank you sir, i was reluctant in buying a cm 907, but because of your fix i decided to go for it 🙂
Worked really well, cheers mate! Didn't expect it, rather laughed when you started going on about the toaster. But it worked! Didn't have clips, pressure didn't seem necessary; just the heat was fine. One tip for future videos: the crux of the solution was a few minutes in, might be nice if you started out with that simple tip.
Rod, have to say a big thanks for sharing your video. I used a hairdryer on our thermostat following your instructions and was totally amazed at it actually working, you've saved me £90. I'd buy you a pint if I was close lol🍻🍻 cheers mate
Hi Rod, thank you very much for your very informative video my unit is a different model to yours but basically the same, I followed your instructions to the letter but the only difference I made was I had to give the LCD a longer heat period, I also kept moving it across the top of the toaster rather than have it stationary, I was so worried about damaging the unit, after about one minute of waving it across the heat plume from the toaster I stopped and let it cool completely down, put it back together and the display is working perfectly, again thank you very much for taking the time to share your knowledge with us, all the best Martin.
Thanks! Worked like a charm! My display started to fade in the room temperature zone, (only) after 5 years after installation. This Dutch guy has a good weekend thanks to Handy Hawkins.. PS used the hair dryer method, after dismounting. :-)
I came here to see how to take it off the wall and you've show me how to fix the thing that's gone wrong! Thanks.
Worked a treat, back to full working order, poor of Honeywell to completely dismiss this known fault. Last product I have off them.
Thanks again.
I did this and it worked! Thank you so much. Really thrilled and proud of myself - my first look at the inside of anything electronic. Thank you!
Thanks Rod - really helpful. I had no characters at all. Ended up with Dyson hairdryer on full heat for 2min 30sec at really close range and it sorted it with all characters visible if one or two bars still missing. (tried shorter time and tried toaster before). Now a fully functional CM927. Great result. Thanks for sharing and for your clarity of instruction.
Fantastic, it worked! Did it twice but now it’s like new. Very happy with this instructional video.
Thanks for this. Worked for me. Did as you explained, and put it above my toaster for 20secs, but that didn't work. Tried again but then let it on the toaster for +1min, screen turned completely black and then let it cool down and saw the black blotches disappear. Works fine now.
Thanks - it worked a treat. Had to heat it up a few times and apply press to get all the digits back probably due my toaster not being as hot. Saved £ and plastic waste - very happy!