It's often a good idea to latch the valve's lever in the manual position so that the valve is in mid position. Then when you drain down you don't get any nasty surprises when the valve is removed because all pipes to it should be fully drained.Another tip. I cut the old valve's 5 wires at the wiring centre to leave a 3 inch (approx.) piece of all the wires still connected to the block. Then when you come to wire up new valve you just undo each of the screws on the block one at a time, pull out the small bit of the old wire in the connection and put the wire of the same colour on new valve into it's correct connection. Can't go wrong.
dereton33 hello mate. I have the same Honeywell as you but my problem is the heating is coming on as soon as the hot water comes on. Do you have any suggestions how to fix this please? I was wondering if I could use this same trick but in reverse if that makes sense?
I did this job a couple of years ago but with no You Tube help,it went ok but I would have felt more confident if I’d seen your video first,thank you for posting this.
Al. Thanks very much. Sincerely! I have forwarded the link to this video to a former customer of mine. Read on and you will understand why. The customer, ostensibly a "competent" DIY'er, called me to attend a faulty 3 port. No heat, no hot water. Controls, pump and (wall/cylinder) stats working OK. The cwst/f&e tanks and cylinder were all in the loft. What struck me was that the cover off the wiring box was already off, so alarm bells rung straight away. I multi meter tested the controls to check that they were switching on heat, hot water and both on demand and diagnosed that the valve was the cause of the fault. I initially thought that someone had been "tinkering" with the wires. I had to traipse across Sheffield to Rotherham, at rush hours end, after a long day on another job to diagnoses the fault. I stated that I could only get back at 7pm the next day. I called the customer at 6 pm, next day. Left voice mail as a courtesy. "I've been and bought the part, I'm on my way and running early. See you 6.30 to 6.45". Sat in van til 7.45. No one at home, no call from customer "please wait I'm running late". So, I turned off my phone and drove home. 3-4 hours of my time + fuel and 2 consecutive evenings where I could not say "nighty night" to my 5 year old son. I can only presume that the customer fixed it himself. I really hope that he watches all of your videos in future and doesn't waste any more of my time, ever, EVER again! I have not even received a call to say "thanks, I've fixed it myself" Wont hold my breath.
Sorry you had your time wasted, I doubt he fixed it himself probably found someone on the cheap. I was a plumber like yourself for 50 years and the amount of times I have been left in the same position.
Sorry, Robert. It is an inappropriate forum to advertise my services. May even transgress You-Tube policies and upset Al. However, if you need a guide as to obtaining the services of a qualified and trustworthy tradesman, especially plumbers/heating engineers, who wont rip you off or botch the job; best bet is to go to your local independent plumbers merchants and ask. I'd avoid the big national companies. If you're local to Sheffield, try Plumco Woodbourne Rd (ask for Neil) or PDQ Heating Spares (ask for Maxx or Mark).
Thanks Alan, really useful video you uploaded. Good natured and set at a good pace. Understood easily thanks to you. Feel my valve needs replacing as keeps ticking and heating only trigger when hot water is on.
Very helpful video. I'm not a gas technician just watching videos for the lazy gas technicians who work at my place to know what they are doing and complaining about. Cheers mate
Hi Al, as you say it can be beneficial to change the whole fitting as the problem may have been caused by a siezed valve spindle burning the motor out. Not everyone has the skill to test the actuator head to find a fault, so better for the DIY' er to change the lot. Nothing worse than fitting a new head to have it burn out 5 mins later. So always try to turn the valve spindle with your fingers first (Should turn easily 1/4 turn) if planning to just renew actuator.
i have a combi boiler a Keston C25, the zone motorized valve was broken in the system, thx to this video i replaced it myself, its a 2 port valve, was pretty easy to replace, just had to buy to wrenches to hold the valve , it was hard to remove the nuts. Before taking it off i was not sure what is actually sealing the water, but than i saw in your video the ring on the pipe, i have the same, also new ones came with the new valve but i could not remove those rings from the pipe and i did not want to force it so i just left them there, it not leaking. Then i found out the real issue, the valve was actually working fine, tough when i tested it off the pipe it closed the way to the water, but even with the new valve fitted the rads got hot even when the valve was closed, than i realised that the water pressure makes its way through the closed valve unless the motor is installed on it, cause that is forcing it closed, not its ok. The main issue was actually that another pipe above the valve was leaking and dropping water on the electrical connection shorting the motor and burnt the fuse in the main switch on the wall, so actually i could have replaced the motor only and fix the leak above, but anyway it was so easy to replace the valve now i a have a new one. question : do i have to do anything now, like bleeding the rads or something? the hot water is good, the rads get hot when the thermostat switches the valve and boiler on, this is a small apartment so i only have one zone for the whole apartment therefore only one valve for the whole heating system, so the system seems to be operational, what else do i have to do?
Hi mate, Great video, I'm going to replace the exact one, the only trouble is the new one i have, cable won't reach the connection box, would it be OK to cut the cable and use thermal block connectors, many thanks gary
Thanks for the informative video. I have a Drayton 2port valve that is seizing and allowing water to pass as it doesn't shut fully. The motorhead is fine. My system is unvented. I have good understanding of plumbing and electrics and am competent with the basics. I have read that to work on unvented systems you have to be "G3" accredited. Does this apply if a homeowner just wants to replace a central heating zone valve or should I get a professional in? Also am I ok to reuse existing olives as the look like quite a job to get off? I noticed you seemed to reuse the existing ones, should they seal ok? Thanks.. and sorry for all the questions 🙂
You will be fine to work heating system it is just the gas side you are not allowed to touch. Leave the olives on the pipe work they are usually ok, Just put some boss white on them.
I always take a pic of wires before removing anything. I'm no plumber or electrician and get my work signed off but I would like to know if those 3-way / 3 wire valves on Amazon are legal in the UK - given that the green/yellow is the "neutral", blue is "live" and brown is the other "live". I know exceptions have been made in multi-switch lighting circuits.
Hi Al. You say to refill your system but what's the best way to do this? Is it just switch the water back on, wait for the water to stop filling the system and bleed each individual radiator? What about the boiler, do you need to take any precautions to make sure that fills? What about preventing airlocks or how to remove them if you get one? Thanks!
As you say, just switch back on, wait for the system to fill, bleed radiators and let any air out of air stalks near the cylinder,( if you have any). The boiler will refill on it`s own. As for air locks, it really is pot luck, some systems get them others do not.
I'm going to be doing this myself on my 2 port valve body this weekend. I notice you just undid the old nuts and left them and the little copper washer things on and reused them. The new valve body comes with new ones, I assume it's ok to just re-use the old ones then? From what I gather from your vid as long as they are done up tight they won't leak? Thanks Phil.
@@dereton33 thanks a lot I'll do that, I wasn't sure if it they were reusable or single use. Do you have any advice on fitting the old nuts and washers back? Like do you have to push the washer upto the new valve body before tightening the nuts? Do you use PTFE tape or any other kind of sealant or will just tightening them up be ok? Thanks Phil.
I have just had a new consumer unit fitted to replace an old type fuse box.When the port valve comes into operation to switch hot water over to rads it is tripping out the electrics.I was warned that the new unit would be more sensitive to faults than the old fuse box.I am putting the port valve onto manual when the water is hot enough and it is working ok in that position.The water is heated by a coal fire/back boiler system.Any advice would be greatly appreciated.
Thanks Al i tried the leverover to manual but it didnt "motorise " like your one did no pressure just slips back and forth so could top have failed ? Im only getting slight heat to the tails to one rad but its not constant . Pipes from cylinder are roasting tho ! Any help gratefully received cheers Pat
Brilliant video. My heating stopped about a week ago I looked at the motorised valve and to begin with I found that the little manual over ride arm pushed along into the slot and the heating started to work, but now the arm is loose. I presume this means the valve is stuck. Is now the time to replace the whole thing?
+dereton33 Thank you. I have managed to get manual override to work again and have hot water and C/H. Is it OK to leave it like that for a while until I fix it? I thought about changing the synchron motor only but not sure if that's the problem. I defiantly know its one or the other. For ease I would prefer just to change the motor but then I may have to change the valve.
Hi, which position should the motor's switch be in? Should I put it in the manual, automatic, or mid position? Or will the motor do all that for me? Note that I found it in the mid position after I found the radiators were getting hot with the thermostat down whilst the system was heating the hot water tank on a timer. I had it on for 1.5hr which meant the central heating was on all that time during mild weather. Is it anything to do with the position of the switch on the motor? Appreciate your help.
Thanks for your video. I have a 3-way valve positioned at a level half way up the hot water cylinder. Therefore I assume I would have to drain the cylinder at least half way before removing the valve. (Shut off the ball valve in the cold water tank, and run taps?) Also turn off the cold feed to the central heating and drain out enough CH water to get below the level of the 3-way valve. Would this be correct?
The water in the cylinder cannot pass back to the valve as the flow and return pipes going into and out of the cylinder pass through an inner coil that is separate from the water in the cylinder.
Hey, another great vid and I need to do this process so before I fill up my house with water lol, I know you said to try and get the exact same fitting but I have an old system but have found something that looks the same. I put in a few numbers to check the part etc and it looks like the same. So my question is, as long as the diameter is the same and the same ports etc I can't go too far wrong, correct ?? I know the colours of the wires may be different but I will tackle the wiring at the same point. If it all looks different then I won't touch the wiring but I'm gonna need a new valve anyway. What do you think ??
Hello mate, so today I tackled fitting a new 3 way valve but now I'm having trouble. I can't get the boiler to fire even though its calling for heat. The wiring was easy as they were exactly the same as the old ones. I'm finding that the middle pipe coming from the valve has a pump about a foot or 2 above the new valve, this pipe doesn't get hot, not sure whether it should or not. Also noticed the pump is really hot, could it have an air lock and would this stop the boiler firing up ?? How can I fix this without draining the whole system again ?? Thanks for any tips, ah also, the manual switch on the side on the new motor on top of the valve is very limp, is that right ?? When I slide it up to the auto position it just falls back down again, even so I thought I should get hot water to the rads which I'm not. Seems we won't get any hot water at the moment. Here's hoping you have some tips to help me. Thanks again !!
Hi Rob, turn off the heating and hot water, you probably have air in the system, try cracking open the joints on the 3 way valve to let any air out. Also the joints around the pump, also bleed any air out of the pump.The problem with a different make of valve maybe that the wiring may look the same but the small micro switch that fires the boiler may not be connected right. Do not worry about the lever on the valve they can be like that..
Hello again lol, OK so valve is working as it should I think, but I can't get the boiler to stay on as there is still air in the system and for the life of me I cannot get rid of it. I haven't started cracking open the joints near the pump yet as I don't wanna flood the place again....last night I ended up draining the whole system again as I got a leak from one of the joints above one I undone. It was carnage but all sorted now, the leak I mean not the air lock. So any more tips without opening the joints near the pump ?? I've been bleeding the rads for over an hour now in sequence and I'm getting a hiss now and again but now they all seem to be full with just water and I can't get to the air lock. HELP !! lol
Wow thanks very much for uploading this, my 3 way valve had failed and I watched your video where you advised to swap it over to manual and that has got us up and running and now . Ive subbed to your channel are you actually obey wun kenobi!
hi, great vids, im going to attempt this myself only thing is i checked the wiring and my original valve only has 4 wires blue, white, grey and yellow, the original is a Myson if that helps, if i buy a new one with 5 wires where do i put the 5th wire??
You will be best to consult an electrician, as heating systems are all wired different depending on the system. No system is the same. An electrician can check the right wires go in the right connections.
Quick question please guys, I have a 3-way directional unit but when I turn the heating on it seems to be heating up the hot water too. I've opened the directional valve silver cover to see that when I turn the heating on the mechanism is physically moving which it is but if I were to turn the water only on & not the heating the mechanism doesn't move at all. Does this indicate to a faulty directional valve unit ?
Hi, I was wanting to move a mag filter near my boiler on the return of a vented system. I was wondering when I drain down the system could I just turn all the radiators off to save draining them or would that create air problems when I go to re fill?
I had hot water but no heating, tried over riding manually by pulling the lever across, worked for 10-15 mins, off again, changed the valve every thing worked but once we turned the heating off, never came back on again, even the hot water had gone, boiler not responding anymore...could it be an air lock?
How much movement should there be in the actual valve? My motor had seized so was planning to replace as the valve can be easily turned by hand. However the valve only turns about 45 degrees (approx 1/8th of rotation) andsee in one of the comments it should be able to turn a quarter (90 degrees). Can you advise how much movement the valve should have as I’d like to know if it needs replaced as well as I can easily to the head, however to do the valve I’d get a plumber
Ive just changed the valve. However.. upon re filling the heating. What am i missing/doing wrong? I put the bleed key and undo, but theres no rush of water or rush of air.. just.. nothing. I presume ive missed something to get water back into the rads.
You'd have been cheaper buying a 3 port body replacement kit (Honeywell 40003918-007) and a separate Powerhead 003 or synchron motor, than changing the entire body and head.
RIght just done this job and i can hear the motor running now in the valve when I turn on the programmer. However, the boiler is still not firing up when calling for heating, but fires up fine when hot water is called? Wall thermostat is working fine :(
Hi, thanks for the video. When I turn the hot water on the boiler fires up no problem but when I turn the heating on the boiler doesnt start up. Would this be a problem with the valve? Thanks for your help.
Hi, I need to replace this valve. Am I correct in saying the procedure is as follows: 1. Turn off water supply from mains outside the house. 2. Turn off electricity at mains (erring on the side of caution here) 3. Open taps on ground floor. 4. Open taps on first floor. 5. Then replace valve. 6. Then do 1-4 in reverse order? Thanks
If you have a Combi boiler then there is no need to turn the water off, if you have an F and E system then you do. No need to open any taps, just locate the drain valve on the heating circuit, attach a hose then drain the heating system. When finished if you have a Combi you will need to re-pressurise the system, if you have an F and E system just turn the water back on. Bleed all radiators.
@@dereton33 Thank you for coming back to me. I have a hot water cylinder in airing cupboard in a bedroom; no combi boiler. Presumably this is the F and E system. Where would I locate the drain valve? Would this be on the hot water cylinder or somewhere in the airing cupboard? Do I bleed all radiators once everything is done?
@@dereton33. Much obliged for your advice. But what if you have a means , in line, of stopping the flow of water to the three inlets to to valve, surely then we would not have to drain the system, only the small amount of water in the pipes.
My 3-way valve is upstairs in the airing cupboard. All my radiators are below this level, so there is no need to drain them. The plumbing has an isolating valve between the pump and the 3-way valve inlet. There is a shut-off valve (Type with a red wheel handle) in the outlet from the valve to the radiators (Not needed as all radiators are below the valve), and the heating coil in the hot water cylinder is below the valve. There is a shut-off valve in the pipe from the tank coil too. So as long as I shut off any valves in supplies from the header tank, there is no need to drain the system. Aren't most systems designed like this, so that there is no need to drain.
Changed mine today after watching this. Big thanks for the vid and saving me money by doing it myself 👍🏻👍🏻 Subscribed 😃
Thanks for the sub!
You sir, are a true gent and make even the difficult of jobs sound like a stroll in the park on a Sunday. God bless you young man! And thank you.
No problem and thanks for the very kind comments.
It's often a good idea to latch the valve's lever in the manual position so that the valve is in mid position. Then when you drain down you don't get any nasty surprises when the valve is removed because all pipes to it should be fully drained.Another tip. I cut the old valve's 5 wires at the wiring centre to leave a 3 inch (approx.) piece of all the wires still connected to the block. Then when you come to wire up new valve you just undo each of the screws on the block one at a time, pull out the small bit of the old wire in the connection and put the wire of the same colour on new valve into it's correct connection. Can't go wrong.
Thanks for some great advice. Al.
dereton33 hello mate. I have the same Honeywell as you but my problem is the heating is coming on as soon as the hot water comes on. Do you have any suggestions how to fix this please? I was wondering if I could use this same trick but in reverse if that makes sense?
Good tip leaving small tails for reference.
@@denwinter7730 I would suggest the 3 port valve needs replacing in any event - what you describe suggests it is stuck ...
@@guido7412 thanks mate. We did get it replaced and now it's working like a dream 👍🏻
Excellent tutorial, no bull, just straight to point 👌
No problem.
A love Al, even if i'll never need to do what he is in his video is i'll still watch it!👍🏻
I did this job a couple of years ago but with no You Tube help,it went ok but I would have felt more confident if I’d seen your video first,thank you for posting this.
Glad I could help
Al. Thanks very much. Sincerely!
I have forwarded the link to this video to a former customer of mine. Read on and you will understand why.
The customer, ostensibly a "competent" DIY'er, called me to attend a faulty 3 port. No heat, no hot water. Controls, pump and (wall/cylinder) stats working OK.
The cwst/f&e tanks and cylinder were all in the loft. What struck me was that the cover off the wiring box was already off, so alarm bells rung straight away. I multi meter tested the controls to check that they were switching on heat, hot water and both on demand and diagnosed that the valve was the cause of the fault. I initially thought that someone had been "tinkering" with the wires.
I had to traipse across Sheffield to Rotherham, at rush hours end, after a long day on another job to diagnoses the fault.
I stated that I could only get back at 7pm the next day. I called the customer at 6 pm, next day. Left voice mail as a courtesy. "I've been and bought the part, I'm on my way and running early. See you 6.30 to 6.45". Sat in van til 7.45. No one at home, no call from customer "please wait I'm running late". So, I turned off my phone and drove home. 3-4 hours of my time + fuel and 2 consecutive evenings where I could not say "nighty night" to my 5 year old son.
I can only presume that the customer fixed it himself. I really hope that he watches all of your videos in future and doesn't waste any more of my time, ever, EVER again!
I have not even received a call to say "thanks, I've fixed it myself"
Wont hold my breath.
Sorry you had your time wasted, I doubt he fixed it himself probably found someone on the cheap. I was a plumber like yourself for 50 years and the amount of times I have been left in the same position.
What is your company? I will keep your number handy :)
Sorry, Robert. It is an inappropriate forum to advertise my services. May even transgress You-Tube policies and upset Al. However, if you need a guide as to obtaining the services of a qualified and trustworthy tradesman, especially plumbers/heating engineers, who wont rip you off or botch the job; best bet is to go to your local independent plumbers merchants and ask. I'd avoid the big national companies. If you're local to Sheffield, try Plumco Woodbourne Rd (ask for Neil) or PDQ Heating Spares (ask for Maxx or Mark).
Thanks Alan, really useful video you uploaded. Good natured and set at a good pace. Understood easily thanks to you. Feel my valve needs replacing as keeps ticking and heating only trigger when hot water is on.
Glad it helped
Very helpful video. I'm not a gas technician just watching videos for the lazy gas technicians who work at my place to know what they are doing and complaining about. Cheers mate
No problem Stee.
Hi Al, as you say it can be beneficial to change the whole fitting as the problem may have been caused by a siezed valve spindle burning the motor out.
Not everyone has the skill to test the actuator head to find a fault, so better for the DIY' er to change the lot. Nothing worse than fitting a new head to have it burn out 5 mins later.
So always try to turn the valve spindle with your fingers first (Should turn easily 1/4 turn) if planning to just renew actuator.
Thanks good advice Marilyn..
What a smart and nice man! great video!
Thanks Linda.
i have a combi boiler a Keston C25, the zone motorized valve was broken in the system, thx to this video i replaced it myself, its a 2 port valve, was pretty easy to replace, just had to buy to wrenches to hold the valve , it was hard to remove the nuts. Before taking it off i was not sure what is actually sealing the water, but than i saw in your video the ring on the pipe, i have the same, also new ones came with the new valve but i could not remove those rings from the pipe and i did not want to force it so i just left them there, it not leaking. Then i found out the real issue, the valve was actually working fine, tough when i tested it off the pipe it closed the way to the water, but even with the new valve fitted the rads got hot even when the valve was closed, than i realised that the water pressure makes its way through the closed valve unless the motor is installed on it, cause that is forcing it closed, not its ok. The main issue was actually that another pipe above the valve was leaking and dropping water on the electrical connection shorting the motor and burnt the fuse in the main switch on the wall, so actually i could have replaced the motor only and fix the leak above, but anyway it was so easy to replace the valve now i a have a new one.
question : do i have to do anything now, like bleeding the rads or something? the hot water is good, the rads get hot when the thermostat switches the valve and boiler on, this is a small apartment so i only have one zone for the whole apartment therefore only one valve for the whole heating system, so the system seems to be operational, what else do i have to do?
If all is working well then do nothing. You have completed a common plumbing job.
Thank you!
No problem.
Nice helpfull video Thanks
Most welcome
Thanks very much, your video's are invaluable ,😁👍👍👍
No problem Joe.
nice man .good job
Thank you! Cheers!
Thanks for this. Top stuff
No problem 👍
Hi mate, Great video, I'm going to replace the exact one, the only trouble is the new one i have, cable won't reach the connection box, would it be OK to cut the cable and use thermal block connectors, many thanks gary
Yes should be fine. Use one of the ones encased in a plastic box, similar to the connection box.
@@dereton33 thanks mate, i thought so, I have strips of connectors but haven't seen them in a box
Thank you , very informative video
Thank you Sun Rise.
Con artists an overpriced dishonest plumbers an tht must hate this guy. Bless u Al com over to my house any time
Ha ha will do .
Thanks for the informative video. I have a Drayton 2port valve that is seizing and allowing water to pass as it doesn't shut fully. The motorhead is fine. My system is unvented. I have good understanding of plumbing and electrics and am competent with the basics. I have read that to work on unvented systems you have to be "G3" accredited. Does this apply if a homeowner just wants to replace a central heating zone valve or should I get a professional in?
Also am I ok to reuse existing olives as the look like quite a job to get off? I noticed you seemed to reuse the existing ones, should they seal ok?
Thanks.. and sorry for all the questions 🙂
You will be fine to work heating system it is just the gas side you are not allowed to touch. Leave the olives on the pipe work they are usually ok, Just put some boss white on them.
And remember to check your outlets. ab= flow from boiler/pump, a= heating, b= hotwater. Assuming it was fitted correctly in the first place that is.
Thanks for the info. Al
Ian Briggs
I always take a pic of wires before removing anything. I'm no plumber or electrician and get my work signed off but I would like to know if those 3-way / 3 wire valves on Amazon are legal in the UK - given that the green/yellow is the "neutral", blue is "live" and brown is the other "live". I know exceptions have been made in multi-switch lighting circuits.
Still legal as far as I know.
Thank you for
Our pleasure!
Legend!
Thanks
Hi Al. You say to refill your system but what's the best way to do this? Is it just switch the water back on, wait for the water to stop filling the system and bleed each individual radiator? What about the boiler, do you need to take any precautions to make sure that fills? What about preventing airlocks or how to remove them if you get one? Thanks!
As you say, just switch back on, wait for the system to fill, bleed radiators and let any air out of air stalks near the cylinder,( if you have any). The boiler will refill on it`s own. As for air locks, it really is pot luck, some systems get them others do not.
I'm going to be doing this myself on my 2 port valve body this weekend. I notice you just undid the old nuts and left them and the little copper washer things on and reused them. The new valve body comes with new ones, I assume it's ok to just re-use the old ones then? From what I gather from your vid as long as they are done up tight they won't leak? Thanks Phil.
Yes a lot less hassle if you use the old ones.
@@dereton33 thanks a lot I'll do that, I wasn't sure if it they were reusable or single use. Do you have any advice on fitting the old nuts and washers back? Like do you have to push the washer upto the new valve body before tightening the nuts? Do you use PTFE tape or any other kind of sealant or will just tightening them up be ok? Thanks Phil.
thank you I now have heat.I dont know if I will change the valve out myself but at least I might not get ripped off employing someone to do it for me.
No problem.
When changing this valve would you recommend draining the heating obvs aswell as the entire hot water cylinder
Just the heating system, no need to drain the cylinder.
I have just had a new consumer unit fitted to replace an old type fuse box.When the port valve comes into operation to switch hot water over to rads it is tripping out the electrics.I was warned that the new unit would be more sensitive to faults than the old fuse box.I am putting the port valve onto manual when the water is hot enough and it is working ok in that position.The water is heated by a coal fire/back boiler system.Any advice would be greatly appreciated.
Faulty valve.
Hi Al great vid i may have to do this soon my question is when you drain down do i need to drain the cylinder down too ? Cheers Pat
No just the heating circuit.
Thanks Al i tried the leverover to manual but it didnt "motorise " like your one did no pressure just slips back and forth so could top have failed ? Im only getting slight heat to the tails to one rad but its not constant . Pipes from cylinder are roasting tho ! Any help gratefully received cheers Pat
Can you change a 3 port valve body without draining the system, meaning freezing the pipes?
No .
Brilliant video. My heating stopped about a week ago I looked at the motorised valve and to begin with I found that the little manual over ride arm pushed along into the slot and the heating started to work, but now the arm is loose. I presume this means the valve is stuck. Is now the time to replace the whole thing?
You may get away with just replacing the head motor on top.
+dereton33 Thank you. I have managed to get manual override to work again and have hot water and C/H. Is it OK to leave it like that for a while until I fix it?
I thought about changing the synchron motor only but not sure if that's the problem. I defiantly know its one or the other. For ease I would prefer just to change the motor but then I may have to change the valve.
I have videos on changing both.
Hi, which position should the motor's switch be in? Should I put it in the manual, automatic, or mid position? Or will the motor do all that for me? Note that I found it in the mid position after I found the radiators were getting hot with the thermostat down whilst the system was heating the hot water tank on a timer. I had it on for 1.5hr which meant the central heating was on all that time during mild weather. Is it anything to do with the position of the switch on the motor? Appreciate your help.
Motor should be in auto position. Leaving it manual means heating and water will be on together.
Hi awesome vid with this 3port valve can central heating water come into contact with domestic water
No they are kept apart.
Thanks for your video.
I have a 3-way valve positioned at a level half way up the hot water cylinder. Therefore I assume I would have to drain the cylinder at least half way before removing the valve. (Shut off the ball valve in the cold water tank, and run taps?)
Also turn off the cold feed to the central heating and drain out enough CH water to get below the level of the 3-way valve.
Would this be correct?
You do not need to drain the cylinder, just the heating circuit to below the level of the valve.
@@dereton33 Thanks. I just wondered what stops half the cylinder emptying back through the pipe from the valve once the valve has been removed.
The water in the cylinder cannot pass back to the valve as the flow and return pipes going into and out of the cylinder pass through an inner coil that is separate from the water in the cylinder.
@@dereton33 Ah, of course, thanks!
Hey, another great vid and I need to do this process so before I fill up my house with water lol, I know you said to try and get the exact same fitting but I have an old system but have found something that looks the same. I put in a few numbers to check the part etc and it looks like the same. So my question is, as long as the diameter is the same and the same ports etc I can't go too far wrong, correct ?? I know the colours of the wires may be different but I will tackle the wiring at the same point. If it all looks different then I won't touch the wiring but I'm gonna need a new valve anyway. What do you think ??
Yeh have a go for it Rob, as you say you can always get an electrician to sort out the wiring.
Hello mate, so today I tackled fitting a new 3 way valve but now I'm having trouble. I can't get the boiler to fire even though its calling for heat. The wiring was easy as they were exactly the same as the old ones. I'm finding that the middle pipe coming from the valve has a pump about a foot or 2 above the new valve, this pipe doesn't get hot, not sure whether it should or not. Also noticed the pump is really hot, could it have an air lock and would this stop the boiler firing up ?? How can I fix this without draining the whole system again ?? Thanks for any tips, ah also, the manual switch on the side on the new motor on top of the valve is very limp, is that right ?? When I slide it up to the auto position it just falls back down again, even so I thought I should get hot water to the rads which I'm not. Seems we won't get any hot water at the moment. Here's hoping you have some tips to help me. Thanks again !!
Hi Rob, turn off the heating and hot water, you probably have air in the system, try cracking open the joints on the 3 way valve to let any air out. Also the joints around the pump, also bleed any air out of the pump.The problem with a different make of valve maybe that the wiring may look the same but the small micro switch that fires the boiler may not be connected right. Do not worry about the lever on the valve they can be like that..
Ok Thanks that great, I'll give that a go. Appreciate you getting back to me !
Hello again lol, OK so valve is working as it should I think, but I can't get the boiler to stay on as there is still air in the system and for the life of me I cannot get rid of it. I haven't started cracking open the joints near the pump yet as I don't wanna flood the place again....last night I ended up draining the whole system again as I got a leak from one of the joints above one I undone. It was carnage but all sorted now, the leak I mean not the air lock. So any more tips without opening the joints near the pump ?? I've been bleeding the rads for over an hour now in sequence and I'm getting a hiss now and again but now they all seem to be full with just water and I can't get to the air lock. HELP !! lol
Wow thanks very much for uploading this, my 3 way valve had failed and I watched your video where you advised to swap it over to manual and that has got us up and running and now . Ive subbed to your channel are you actually obey wun kenobi!
He`s brother.
hi, great vids, im going to attempt this myself only thing is i checked the wiring and my original valve only has 4 wires blue, white, grey and yellow, the original is a Myson if that helps, if i buy a new one with 5 wires where do i put the 5th wire??
You will be best to consult an electrician, as heating systems are all wired different depending on the system. No system is the same. An electrician can check the right wires go in the right connections.
Quick question please guys, I have a 3-way directional unit but when I turn the heating on it seems to be heating up the hot water too. I've opened the directional valve silver cover to see that when I turn the heating on the mechanism is physically moving which it is but if I were to turn the water only on & not the heating the mechanism doesn't move at all. Does this indicate to a faulty directional valve unit ?
Yes faulty microswitch in the valve.
@@dereton33 many thanks
@dereton33 just replaced the directional valve and I have the same problem again when I put the water on the heating is on as well, any ideas ???
Hi, I was wanting to move a mag filter near my boiler on the return of a vented system. I was wondering when I drain down the system could I just turn all the radiators off to save draining them or would that create air problems when I go to re fill?
You can turn them all off. Air problems is a matter of luck, some systems do, others dont.
I had hot water but no heating, tried over riding manually by pulling the lever across, worked for 10-15 mins, off again, changed the valve every thing worked but once we turned the heating off, never came back on again, even the hot water had gone, boiler not responding anymore...could it be an air lock?
Yes air in the system.
How much movement should there be in the actual valve?
My motor had seized so was planning to replace as the valve can be easily turned by hand. However the valve only turns about 45 degrees (approx 1/8th of rotation) andsee in one of the comments it should be able to turn a quarter (90 degrees).
Can you advise how much movement the valve should have as I’d like to know if it needs replaced as well as I can easily to the head, however to do the valve I’d get a plumber
You should be able to turn them a lot more than that, the motor has seized.
@@dereton33 Thanks
when replacing the valve do you need to drain both the hot water and central heating system, mine is a sundial Y plan system? thanks
Just the heating system.
@@dereton33 thanks
Ive just changed the valve. However.. upon re filling the heating. What am i missing/doing wrong?
I put the bleed key and undo, but theres no rush of water or rush of air.. just.. nothing. I presume ive missed something to get water back into the rads.
Check the F and E ballvalve is not stuck.
Wouldn’t even drain system, just bung small loft tank and vent pipe. Saves time
Thanks for sharing. As well as the 3 port mid position valve I have a red 2 way grundfos valve looks like your green one. What is that?
A bypass valve.
@@dereton33 From what I see in the video, the green - 2 port valve you describe is the water pump .. !
No I have a three port video showing to be changed in the video. The pump is a pump.
Thanks All !
You said you prefer boss white and a lot of people don't. Do you mean as opposed to ptfe tape?
Yes
You'd have been cheaper buying a 3 port body replacement kit (Honeywell 40003918-007) and a separate Powerhead 003 or synchron motor, than changing the entire body and head.
+Daniel Caie Thanks Daniel.
How often would you flush the system out and replace the inhibitor as routine?
Thanks
Every 10 years.
+dereton33
thanks
Inhibitor is only good for five years, from sentinel ;)
RIght just done this job and i can hear the motor running now in the valve when I turn on the programmer. However, the boiler is still not firing up when calling for heating, but fires up fine when hot water is called? Wall thermostat is working fine :(
Check the wiring is around the right way. Also check the thermostat has the wiring the right way round.
@@dereton33 yes they are. Red is live, second wire is black. Should the wires be stripped at the end or are they fine as they are out of the box?
Stripped at the end. Just to make sure of a decent connection.
Hi, thanks for the video. When I turn the hot water on the boiler fires up no problem but when I turn the heating on the boiler doesnt start up. Would this be a problem with the valve? Thanks for your help.
The way to find out is to switch the valve to manual mode.
Electric wires and water pipes all together at the same place ONLY IN THE UK.
We know how live dangerously.
Hi,
I need to replace this valve. Am I correct in saying the procedure is as follows:
1. Turn off water supply from mains outside the house.
2. Turn off electricity at mains (erring on the side of caution here)
3. Open taps on ground floor.
4. Open taps on first floor.
5. Then replace valve.
6. Then do 1-4 in reverse order?
Thanks
If you have a Combi boiler then there is no need to turn the water off, if you have an F and E system then you do. No need to open any taps, just locate the drain valve on the heating circuit, attach a hose then drain the heating system. When finished if you have a Combi you will need to re-pressurise the system, if you have an F and E system just turn the water back on. Bleed all radiators.
@@dereton33 Thank you for coming back to me.
I have a hot water cylinder in airing cupboard in a bedroom; no combi boiler. Presumably this is the F and E system.
Where would I locate the drain valve? Would this be on the hot water cylinder or somewhere in the airing cupboard?
Do I bleed all radiators once everything is done?
The drain valve will be either by the boiler on a central heating pipe, or a radiator located on the ground floor.
al got no radiators working only one radiator upstairs still got hot water and all pipes around tank are hot
Open the 3 way valve to manual to get you by for now.
@@dereton33 thanks Dave they weren't using the thermostst
I wish I worked for you.
Good video Al. So Al, how do you do this without draining the system?
Hi Barry, you can only change the head gear without draining, if you want to renew the whole valve it will have to be drained down,
@@dereton33. Much obliged for your advice. But what if you have a means , in line, of stopping the flow of water to the three inlets to to valve, surely then we would not have to drain the system, only the small amount of water in the pipes.
Yes that is right.
Drain the system with 20 rads...Err I don't think so. Why do they not install 22mm isolation valves on either side of these replaceable items?
I just know they don't.
My 3-way valve is upstairs in the airing cupboard. All my radiators are below this level, so there is no need to drain them. The plumbing has an isolating valve between the pump and the 3-way valve inlet. There is a shut-off valve (Type with a red wheel handle) in the outlet from the valve to the radiators (Not needed as all radiators are below the valve), and the heating coil in the hot water cylinder is below the valve. There is a shut-off valve in the pipe from the tank coil too. So as long as I shut off any valves in supplies from the header tank, there is no need to drain the system. Aren't most systems designed like this, so that there is no need to drain.
hi.. where are you based?
In Devon.
@@dereton33 hi there. Could I ask you for your phone number please? Thanks in advance.
Who is the authorized dealer in south east Asia ? Could you please send me any contact detail
junk