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I have a old Williamson round thermostat. The boiler turns on and off as the thermostat is adjusted. The problem I'm having is the room temp in the apartment does not go higher than 64° if the thermostat is set for say 70°. Any suggestions? Thanks
Thankyou sir. The red to white wire method worked to start my furnace, prompting me to get a new thermostat. I'll hook it up and get the house up to 72° before bed just for tonight and get to home depot tomorrow.
Thanks for the more detailed video than anyone else’s and I understood every word clearly mostly because I’m not an ass hole like some of the other people who watched this.
Thanks for taking the time to post this! Followed your advice and my old mercury thermostat finally bit the dust. Replaced it and back in business! Got a new digital programmable thermostat for what I would have paid just for a service call!
How does an old thermostat dial turn itself up with no one there to do it? We came home to it all the way up as far as it could go, it was left at 66 degrees
Thank you so much for the simple explanation that even I can understand. Unfortunately for me, jumping the red and white wires did NOT get my heat working so the problem is elsewhere.
Thanks very much for sharing this valuable info, best video by far!!! I have Forced hot water heat, with a 38 year old Hydrotherm gas fired boiler for a two bedroom apartment, The thermostat was not coming on unless we removed the round cover and placed it back on. We installed a new round similar t'stat and it is not starting. Any suggestions? Thanks!
hey I know its an old video but thanx I just fixed my Gas fire place doing some of your tests ..I just had to tighten the unit(the thermostat assembly) the contacts were dirty and it had come a bit lose I only have the simple one switch thermostat for my Gas fireplace ..cheers I love UA-cam
Thanks so much for the thorough video. I'm trying install a Nest Thermostat and I have very little background with this stuff. Your video helped me understand the logic of thermostat (way simpler than I thought) and I feel confident that I can move forward.
why does my t87 themostat (model year stamped 1986) only have five wire screws? .. I have 2 blue at top. Where your red wire is an empty slot on mine at the 7 o'clock position. my RED wire is the one at the 9 o'clock position.. yellow and white are correct. . When I try to jump the AC.. only the fan kicks on. Ive notice my thermostat was acting very strange the last few days and now nothing works.. but I can get the fan to run? doesn't make sense.
Hello there , I really use some help. I have an old honeywell thermostat that will not come on at all. It is pretty cold tonight and I am very cold. What can i do to fix it so it will work again....😥😢😭😓
I have a CT87N4450 I installed my thermostat and set the temp for 70 degrees when the furnace comes on it will heat up to 67 degrees and turns off for a few minutes and then restarts again but never rises to the setting of 70 degrees!
The only problem I can see from this far away is if there is a call for heat when the furnace shuts off. Turn your thermestat down to 60 degrees and let your house cool to that temp. Turn the thermestat up to 70 degrees and your furnace should run constant till it reaches about that temperature. The thermestat may not be level or out of adjustment. The heat anticipater could also keep it from reaching temp. Let me know if you need any more help. If I were to guess that on off on off could be a heat anticipater adjustement.
I called Honeywell and had me go through a number of steps and after that they told me my thermostat was defective and told me to return it to the vendor and they would replace it. Ace Hdwr did replace it and I went home and installed it and it is working just Great. Thank you for your fast turnaround time!!!
My new digital thermostat doesn't always turn my forced air furnace on. If I reset the thermostat it works fine. Sometimes it happens once a month, sometimes I have to do it twice a day or more. Any help would be greatly appreciated.
thank you for the video, I woke up in the middle of the night to a bedroom that was 76°. I'm scared to check it so I'll show this video to my boyfriend when he gets home from the overnight shift. Too nervous to do it by myself. Thanks again.
+themrhelperguy if I turn the thermostat all the way down to 40 it will just keep running.I have the same type as in your video. I would give more info if I knew more.
+basszack you could take the top of the thermestat off and that will eliminate the call for heat. All you need is a small screwdriver. To shut the furnace off turn the power off to the furnace
+themrhelperguy I'm going to guess that your furnace is very old. There are many reasons that a furnace will not shut off. Stuck gas valve, shorted gas valve, short in thermestat wire, ect.
+basszack the first step would be to isolate the thermestat and thermestat wiring from the furnace. On an old furnace this is often not that easy to do because the wires are not clearly marked.
Hi there. I have enjoyed lots of your videos and learned quite a bit. Recently, just before this Arctic cold front arrived, my brother in laws mobile homes electric heat died. I ran out to his place and after taking the cover off his furnace wiring I see several wired with all the insulation burned off. Oh crap!! After looking it all over I realized it was all the 24 volt wires that were burned up. So, I replaced all the burnt wires. Still no heat. Since this is a mobile home unit it has two switches, attached to a circuit board with several relays, one for heat or cool, and another switch for fan auto or fan on. I could switch the fan to on and the fan would come on. So I thought the circuit board must be fried. So to get him heat until my friend which is a heat/air guy could make it. I had to replace the 24 volt transformer. I hooked the 24 volt transformer direct to the 24 volt connections of his sequencer. Turned on the fan switch and then he could use his main furnace circuit breaker on to get the house heated up then flip it off until the house started cooling again. Then yesterday my heat/air guy came out. He did say it looked like the circuit board was fried. I looked several places online and the cheapest for his board was around $300.00. So wasn't going to do that on a 20 year old furnace, and he couldn't afford it anyway. So what we did was bypass the circuit board and use a fan relay along with the sequencer to get it going. Now our problem! The house already had on the wall the White Rogers heat/air with the heat/cool system switch and the fan auto/on on the side. So we got it all hooked up. We thought all was fine but then realized the heat and the air conditioner unit outside would both be on when you moved the temp control from heat to cool. The heat/cool switch on the side didn't make any difference. He said the thermostat must be defective and he will come back later on when warmer outside and put on a new thermostat. So, my question to you is is there some internal wiring difference that has to be done to the thermostat to make it work correctly or do you think the thermostat is truly bad? I appreciate your help. Tom
Tom, there is a lot going on there. As far as the thermestat goes the red wire is power to the thermestat. If you remove the thermestat and jump from the red or r terminal to the w or white terminal will bring on the heat. Jump from the red to the yellow or y will bring on the cooling, red to green will bring on the fan. If each function works when jumped I would guess that the thermestat would be suspect.
This video will be greater if you can subtitle this. I'm not a native English speaker so it's difficult for me to hear this. But thanks for your instruction.
I have this thermostat when I tried to jump the red and white nothing happened, were do I go next, I dont have the money to call someone, help me please, whatever u can.
Heil GU-105dd2 gas furnace, and yes it has a pilot, the pilot is lit but the burners want start, I checked the breaker, and made sure the furnace switch was on...the furnace is over 30 yrs. old, I also changed the thermo couple.
So my low voltage fuse keeps blowing , i suspect the wire to the thermostat I have an old two wire mercury thermostat, it kicks on for a while the pop on start up.any suggestions?
Disconnect the 2 low voltage wires from the computer board. Use a jumper wire on the R and W terminals that you disconnected to see if your furnace comes on without blowing the fuse. Or pull the thermestat off its base usually 3 little screws. Then jump out the R and W terminals will eliminate the thermestat. I'm going to guess it's something in the furnace popping the little fuse. This is place that a multi meter would be needed to find the short. Or disconnect items one at a time to see if the furnace will run to that point before it blows. Example disconnect the draft inducer and see it the furnace will fail without blowing the fuse. Disconnect the gas valve see if the furnace will run to the point it will turn on the gas without blowing the fuse. Without a multi meter it will be a long night playing with the furnace with this one.
For four simple mechanical millivolt non-digital thermostats for wall heater, just for wall heater, one by Honeywell, possibly model number CT87K, the words,"Model Number" clearly not stated, another by Honeywell, possibly model number CT33A, again the words, "Model Number" clearly not stated, both recently bought at Home Depot, and two by Williams, possibly Model Number P322016, again the words, "Model Number," clearly not stated, both bought about seven years ago, tried continuity testing with multimeter with thermostat switches at highest temperature reading with no continuity showing on all four of them. The Williams on and off the wall. The Honeywells still off the wall. Does this mean that all four of these thermostats are bad, even the two new ones? What must I do to get continuity to show? Any videos on this? See only videos for continuity tests on other objects including digital thermostats. Bypassing thermostat by twisting two wires coming out of wall sometimes fires up heater. Sometimes tapping on the gas control valve also needed to get heater fired up. Gas control valve also about seven years old. This heater often not ran for months at a time. Maybe even for more than a year. Can gas control valve be merely tapped on to loosen up or must it be replaced? Experienced knowledgeable responses only, not mere opinions, please.
+Xander Manuel Xander's comments were uniquely human and retrospectively humble. I related. themrhelperguy genuinely wants to improve his videos, which saves us amateurs a huge pile of cash. I admire both of you. May you prosper.
@@themrhelperguy same issue. it sounds like your vocal chords are located somewhere in your nostrils. no offense. others can hear you . but i cant. i cant make out the words.
Why is it every time when I come to a troubleshooting video its hosted by an Australian, a Pakistani, or a hairlip? Can't understand a word they mumble.
If I have helped you and you would like to support my channel, you can do so by shopping on amazon through this link: amzn.to/2CS7ZKn Thank you!
_As an Amazon Associate I earn from qualifying purchases._
I have a old Williamson round thermostat. The boiler turns on and off as the thermostat is adjusted. The problem I'm having is the room temp in the apartment does not go higher than 64° if the thermostat is set for say 70°. Any suggestions? Thanks
You just undoubtedly saved me $500 in calling a repair man. I wish I could give this video 5 likes! Thanks again!
That's all great.
Thankyou sir. The red to white wire method worked to start my furnace, prompting me to get a new thermostat. I'll hook it up and get the house up to 72° before bed just for tonight and get to home depot tomorrow.
Hope all goes well
Thanks for the more detailed video than anyone else’s and I understood every word clearly mostly because I’m not an ass hole like some of the other people who watched this.
Thanks for taking the time to post this! Followed your advice and my old mercury thermostat finally bit the dust. Replaced it and back in business! Got a new digital programmable thermostat for what I would have paid just for a service call!
Enjoy your new thermestat.
Red and Green wires. That is exactly what I needed to know. Thank you.
How does an old thermostat dial turn itself up with no one there to do it? We came home to it all the way up as far as it could go, it was left at 66 degrees
Great video. Plain, simple and informative. This is stat that I have in the office. Thank you.
Gas logs will not shutoff even when thermostat reaches level and clicks?
Thank you so much for the simple explanation that even I can understand. Unfortunately for me, jumping the red and white wires did NOT get my heat working so the problem is elsewhere.
Thanks very much for sharing this valuable info, best video by far!!! I have Forced hot water heat, with a 38 year old Hydrotherm gas fired boiler for a two bedroom apartment, The thermostat was not coming on unless we removed the round cover and placed it back on. We installed a new round similar t'stat and it is not starting. Any suggestions? Thanks!
hey I know its an old video but thanx I just fixed my Gas fire place doing some of your tests ..I just had to tighten the unit(the thermostat assembly) the contacts were dirty and it had come a bit lose I only have the simple one switch thermostat for my Gas fireplace ..cheers I love UA-cam
Go you tube.
Thanks so much for the thorough video. I'm trying install a Nest Thermostat and I have very little background with this stuff. Your video helped me understand the logic of thermostat (way simpler than I thought) and I feel confident that I can move forward.
What is the tool you are using to check?
How do i turn it off?
What is the tool you are using??
Thank you so much got my grandma's furnace going again!
Super helpful -thank you!
RED Power Input
You can jump:
-R/W Furnace
-R/Y AC
-R/G Fan
Thanks!!!
Do i have to shut off the electrical panel is turn off?
Shut off the power at the furnace or electrical panel. These thermostats are 24v not a deadly dose of electricy.
What wire do you unhook if you have a heat only honeywell t86 and just want to turn the heat off upstairs what is the right wire to unhoook ? Thanks.
Thank you - this was very interesting and helpful.
why does my t87 themostat (model year stamped 1986) only have five wire screws? .. I have 2 blue at top. Where your red wire is an empty slot on mine at the 7 o'clock position. my RED wire is the one at the 9 o'clock position.. yellow and white are correct. . When I try to jump the AC.. only the fan kicks on. Ive notice my thermostat was acting very strange the last few days and now nothing works.. but I can get the fan to run? doesn't make sense.
There is a lot going on there. I would go to the furnace control board to jump the low voltage circuits to check operation of the systems.
Hello there , I really use some help. I have an old honeywell thermostat that will not come on at all. It is pretty cold tonight and I am very cold. What can i do to fix it so it will work again....😥😢😭😓
What did you do😀?
@@BridsSing I had someone come out and take a look at ..
Great Video.. You made it simple Thank you
I have a CT87N4450 I installed my thermostat and set the temp for 70 degrees when the furnace comes on it will heat up to 67 degrees and turns off for a few minutes and then restarts again but never rises to the setting of 70 degrees!
The only problem I can see from this far away is if there is a call for heat when the furnace shuts off. Turn your thermestat down to 60 degrees and let your house cool to that temp. Turn the thermestat up to 70 degrees and your furnace should run constant till it reaches about that temperature. The thermestat may not be level or out of adjustment. The heat anticipater could also keep it from reaching temp. Let me know if you need any more help. If I were to guess that on off on off could be a heat anticipater adjustement.
Sorry no heat anticipater on this one. Make sure your dip switches are in the right position for you application.
I called Honeywell and had me go through a number of steps and after that they told me my thermostat was defective and told me to return it to the vendor and they would replace it. Ace Hdwr did replace it and I went home and installed it and it is working just Great. Thank you for your fast turnaround time!!!
My new digital thermostat doesn't always turn my forced air furnace on. If I reset the thermostat it works fine. Sometimes it happens once a month, sometimes I have to do it twice a day or more. Any help would be greatly appreciated.
It is a great advice, Thanks for the help.
Jose Quispe thanks Jose
Thank you, jumped red and white. Learned problem was with connection
Sounds good.
Thanks for the video. You said jumping the red and green wires turns on the fan. Which fan? Attic fan? Blower fan on the furnace?
Excellent video 👍
Hi there,
I'm trying to remove the thermostat and I've unscrewed the flat-head screws, but it won't come off. Any suggestions?
+samjesuis make sure you get them all.
Just a follow up to my request for help, is the wiring installed incorrectly or is there some other problems?
If your furnace comes on and runs I bet the wiring is correct.
thank you for the video, I woke up in the middle of the night to a bedroom that was 76°. I'm scared to check it so I'll show this video to my boyfriend when he gets home from the overnight shift. Too nervous to do it by myself. Thanks again.
Overnight shift. Not good I remember them. Good luck.
You are a Godsend! That's exactly what it was.a bad thermostat.Thankyou&God bless.
This guy knows his Hvac stuff/ listen to him.Godbless.
my natural gas furnace won't shut off. where should I start?
+basszack that's a lot with very little information. Shut the power switch off.
+themrhelperguy if I turn the thermostat all the way down to 40 it will just keep running.I have the same type as in your video. I would give more info if I knew more.
+basszack you could take the top of the thermestat off and that will eliminate the call for heat. All you need is a small screwdriver. To shut the furnace off turn the power off to the furnace
+themrhelperguy I'm going to guess that your furnace is very old. There are many reasons that a furnace will not shut off. Stuck gas valve, shorted gas valve, short in thermestat wire, ect.
+basszack the first step would be to isolate the thermestat and thermestat wiring from the furnace. On an old furnace this is often not that easy to do because the wires are not clearly marked.
Hi there. I have enjoyed lots of your videos and learned quite a bit. Recently, just before this Arctic cold front arrived, my brother in laws mobile homes electric heat died. I ran out to his place and after taking the cover off his furnace wiring I see several wired with all the insulation burned off. Oh crap!! After looking it all over I realized it was all the 24 volt wires that were burned up. So, I replaced all the burnt wires. Still no heat. Since this is a mobile home unit it has two switches, attached to a circuit board with several relays, one for heat or cool, and another switch for fan auto or fan on. I could switch the fan to on and the fan would come on. So I thought the circuit board must be fried. So to get him heat until my friend which is a heat/air guy could make it. I had to replace the 24 volt transformer. I hooked the 24 volt transformer direct to the 24 volt connections of his sequencer. Turned on the fan switch and then he could use his main furnace circuit breaker on to get the house heated up then flip it off until the house started cooling again. Then yesterday my heat/air guy came out. He did say it looked like the circuit board was fried. I looked several places online and the cheapest for his board was around $300.00. So wasn't going to do that on a 20 year old furnace, and he couldn't afford it anyway. So what we did was bypass the circuit board and use a fan relay along with the sequencer to get it going. Now our problem! The house already had on the wall the White Rogers heat/air with the heat/cool system switch and the fan auto/on on the side. So we got it all hooked up. We thought all was fine but then realized the heat and the air conditioner unit outside would both be on when you moved the temp control from heat to cool. The heat/cool switch on the side didn't make any difference. He said the thermostat must be defective and he will come back later on when warmer outside and put on a new thermostat. So, my question to you is is there some internal wiring difference that has to be done to the thermostat to make it work correctly or do you think the thermostat is truly bad? I appreciate your help. Tom
Tom, there is a lot going on there. As far as the thermestat goes the red wire is power to the thermestat. If you remove the thermestat and jump from the red or r terminal to the w or white terminal will bring on the heat. Jump from the red to the yellow or y will bring on the cooling, red to green will bring on the fan. If each function works when jumped I would guess that the thermestat would be suspect.
This video will be greater if you can subtitle this. I'm not a native English speaker so it's difficult for me to hear this. But thanks for your instruction.
This person is very hard to understand even for a native English speaker. They do not articulate their words properly.
Thank you! You saved me some money!
That was the problem...Dude, you rock!
Daniel Cesario the thermostat is rarely the problem but if you got it fixed rock on
Great video, thanks so much!
Excellent just what I needed. Thx
Thank You very much!~
Do you hold your nose shut with something while you talk?
No
@@themrhelperguy what could be the problem if when I adjust my thermostat my heat doesn't click on right away?
How to clean this type of thermos? Please...Thank you very much. :) :) :)
I would use compressed air. One of those cans that you use to clean computers.
Thank you very much, and that's exactly what I did...It's working perfect now!...:) :) :)
thanks! just what I needed!
Thank you.
Nice video 👍🏼
I have this thermostat when I tried to jump the red and white nothing happened, were do I go next, I dont have the money to call someone, help me please, whatever u can.
What kind of furnace do you have. Make sure the breaker is on. Does it have a pilot. Or is it newer. I will try to help you.
I will be gone but I will be back.
Heil GU-105dd2 gas furnace, and yes it has a pilot, the pilot is lit but the burners want start, I checked the breaker, and made sure the furnace switch was on...the furnace is over 30 yrs. old, I also changed the thermo couple.
I am thinking I have some electrical problem, what about the capacitor looking thing under the blower
So my low voltage fuse keeps blowing , i suspect the wire to the thermostat I have an old two wire mercury thermostat, it kicks on for a while the pop on start up.any suggestions?
Disconnect the 2 low voltage wires from the computer board. Use a jumper wire on the R and W terminals that you disconnected to see if your furnace comes on without blowing the fuse. Or pull the thermestat off its base usually 3 little screws. Then jump out the R and W terminals will eliminate the thermestat. I'm going to guess it's something in the furnace popping the little fuse. This is place that a multi meter would be needed to find the short. Or disconnect items one at a time to see if the furnace will run to that point before it blows. Example disconnect the draft inducer and see it the furnace will fail without blowing the fuse. Disconnect the gas valve see if the furnace will run to the point it will turn on the gas without blowing the fuse. Without a multi meter it will be a long night playing with the furnace with this one.
Very helpful!!! Thanks so much!!!
I hear the click but it doesn't come on.
There is probably a much larger problem going on.
Dude you Rock! well done, saved me big $ on a service call
You run the moonies.
Nah, just a nickname and thx again for helping me
You are the man.. Thanx...
E.G Hampton glad to help
Love your jumper idea. Could you jumper this from the terminals at furnace or condenser unit?
Yes you could do this at the furnace. Not the condenser unit.
Where’s the video showing how to take this thing off the wall!!? It’s driving me nuts
Maybe here. ua-cam.com/video/_-4LzR17xbE/v-deo.html
Good vid. Thanks for the help!!
For four simple mechanical millivolt non-digital thermostats for wall heater, just for wall heater, one by Honeywell, possibly model number CT87K, the words,"Model Number" clearly not stated, another by Honeywell, possibly model number CT33A, again the words, "Model Number" clearly not stated, both recently bought at Home Depot, and two by Williams, possibly Model Number P322016, again the words, "Model Number," clearly not stated, both bought about seven years ago, tried continuity testing with multimeter with thermostat switches at highest temperature reading with no continuity showing on all four of them. The Williams on and off the wall. The Honeywells still off the wall. Does this mean that all four of these thermostats are bad, even the two new ones?
What must I do to get continuity to show? Any videos on this? See only videos for continuity tests on other objects including digital thermostats.
Bypassing thermostat by twisting two wires coming out of wall sometimes fires up heater. Sometimes tapping on the gas control valve also needed to get heater fired up. Gas control valve also about seven years old. This heater often not ran for months at a time. Maybe even for more than a year. Can gas control valve be merely tapped on to loosen up or must it be replaced?
Experienced knowledgeable responses only, not mere opinions, please.
Why are you 10 miles from the thermostat? I can't see anything...
+Xander Manuel do you want me to redo with a closer shot
+Xander Manuel Xander's comments were uniquely human and retrospectively humble. I related. themrhelperguy genuinely wants to improve his videos, which saves us amateurs a huge pile of cash. I admire both of you. May you prosper.
Peeeeerfect!!
Wat
ok
I don't know what language this is in, sorry.
United States American
Mechanical thermostats waste energy and are inaccurate so buy a digital thermostat, they are also easier to read.
Ok
And they say they have no mercury
"I haven't a clue what you're saying!"
You may want to write it down and have someone else do the talking
Dude sounds like he has his nose plugged
No offense guy your video helped but you sound like bubbles from trailer park boys
Are the Trailer park boys a local thing?
i cant understand a word hes saying
Did you watch the updated video listed in the description you silly goose.
@@themrhelperguy same issue. it sounds like your vocal chords are located somewhere in your nostrils. no offense. others can hear you . but i cant. i cant make out the words.
I am trying with all I got left.
Do you have a cleft lip or something? Sounds like you're talking through a Kazoo. Can't understand what you're saying...
Ex Pat fuck off some place else then 😬
I think you forgot to remove the clothes pin from your nose bro
I didn't forget I leave it on there peremently.
You are the hardest to understand sorry
Yea I'm tuff to beat on that one.
Wow, it's as if this guy is actually speaking through his nose. I need to strain to understand each word. WTF?
Happy Easter
The Jazz Monastery
I’m glad someone was holding a gun to your head forcing you to listen to it all. You sound like a whiner.
You are incredibly rude
Asshole
😂
Why is it every time when I come to a troubleshooting video its hosted by an Australian, a Pakistani, or a hairlip? Can't understand a word they mumble.
you forgot cancer fighter
Ohhh man! now I'm more confused than ever with this guy! Sorry, but can't hardly understand you!
Rafael Gaspar fuck off then
Queeeeee
DOES THIS GUY SOUND LIKE A MUNCHKIN OR IS IT JUST ME ? NUM YOU IS FOR HEATING ? WTF IS NUM YOU ?
He sounds like he has a cleft palate...can often sound nasal like
+Mr. Grumpy's Biggles
😂😂😂