How to tell if your home thermostat is bad 

My son and I used this to troubleshoot my wireless thermostat, I saved hundreds of dollars thank you!!!

Thank you so much! You turned a miserable day of troubleshooting into a quick fix! Thanks again!

82°! As soon as you said that my father raised up out of his grave screaming , "who touched the thermostat, I told you not to touch the thermostat, what're we rich all of a sudden now!?", reset the thermostat down to 67° & stumbled back to the graveyard mumbling about " kids these days"!

Thank you for the GREAT INFO! i just paid $110 to an hvac guy who said your thermostat doesn't work. He did nothing to fix it. I jumped on YT saw your explanation about the batteries and the C port, put in new batteries and fixed the problem! I wish I had seen your video 1 day before. Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Thanks so much! I used a paper clip wrapped in electrical tape as you suggested and determined that my HVAC system works fine and the thermostat is dead. I'll replace the thermostat myself. You saved me an expensive service trip!

This was so helpful in revealing that our thermostat was indeed working right. We ended up after a couple videos like this saving a lot of $$$ on a big costly repair by having a better idea what was wrong with our HVAC. It ended up being a blower motor. We are very grateful. Still a big repair but saved a ton. Thank you.

Omgosh it worked. My ac turned back on. I now know it’s the cover and not the unit. It still just gives me the inside temp and not the setting temp. I was a little worried it now won’t turn off. I don’t want it constantly running. But it did shut off at 76*. I can do that till my new cover comes. 😊 Thank you! Your channel was the only one I found that really helped me out.

Dude, you wont beleive this but ac wasnt working upstairs and had a blank face thermostat. I had checked several things and was almost convinced that it wasnt a thermostat problem. It's 11 pm on a Friday night so I'm pretty bummed about the problem. Saw your video and skeptically tried your idea. I created my own jumps start wire with electrical tape and a paper clip. Connected the R and G and a few seconds later the AC kicked on! So hoping just replacing the thermostat in the morning should solve the problem. Thank you for this video!

Thank you for the video, we bypassed troubleshooting and just changed thermostat and AC started working !!!

A really great video that made a potentially complicated problem very easy to resolve! Thanks

you are the only video I found so far that mentioned that the front of the thermostat may just be bad. I have a blank front case but power comes through back plate.

Thank you very much for teaching us to know if it is the thermostat that is bad or if it is another problem with the system.

This video was the absolute BEST! if it was my thermostat that was causing my a/c to not work, Id be very bummed paying some electrician couple hundred dollars to change my thermostat. This video provided all the info I needed. Brilliant suggesting just trying the fan cause I have one of those programmable units that takes a degree to figure whether the problem is the unit or my inability to get the "wake, daytime, night, start, finish, Mon-Sun" all or even partially correct. Noting 24 volt shock is nothing helped, so you do not have to figure where the hell on your fuse box is the thermostat breaker. The paperclip tool is ingenious, and lastly suggesting buying the same unit (I didn't want the program nonsense), but to skip all the rewiring was a tip I couldn't turn down. THX!!!

Outstanding -- solved my problem in the first 10 seconds. The rest of the video was very informative and invaluable. Thank You, Kudos to you!!!

ordered a new thermostat today bc of this video, thank you my man

75 thumbs down came from the electricians loosing money because of this awesome video!

My suspicions were correct and your quick test confirmed it. Thank you.

Thank you much. Cant believe this worked. I had just recently gotten my AC replaced. With a one year old used one and kept the same 1855 thermostat in my old house. I took off the cover and it did not work. Went to panel on the unit and tried again. This time it worked. So after looking around a bit more I looked into my drain line since they installed a overflow kill switch. My drain outside had gotten clogged up. Unclogged it and turned on right away. Thank you for this video.👍👍👍👍👍👍👍👍

Another very well done video. I now know so much more about that thermostat. Thank you. Thumbs up!

Thank you, this is SO helpful! Just had our furnace serviced twice in four months and now I think it's a bad thermostat. Also, love the Swedish accent!!! 💜

Thank you! This video helped me figure out the problem and fix it in minutes.

I have that same thermostat Honeywell and my unit was not getting cold barely blowing , I looked up videos and found u first, I listen than I changed my batteries 🪫 now my house is cooling good. Thanks 🙏🏾

Very helpful. You make it easy to understand

Omg thank you for ur video!!!! Saved me a lot of trouble!!!! 🙏🏽🙏🏽🙏🏽

I am very happy that I found the problem and solved it thanks to your video!

Thanks‼️used the jumper wire replaced the thermostat back in business

My thermostat, does not turn off the system at all. It was on for few hours, I turn the fan from auto to on and if finally stopped blowing cold air. Everything that you say was very helpful. Thank you.

I really appreciate For the video, saved me a lot of money, god bless you.

thanks so much, now I have to replace my thermostat :). Subscribed!

Fantastic! Thanks 😁. And I love your voice 💜

thank you for making and sharing this video! it's extremely helpful!

The fan comes on but the rest of the thermostat will not work. We replaced the thermostat and used wire strippers to expose a fresh set of wires. Even with the new thermostat, the fan comes on but the rest of the thermostat will not work. Do you know what the issue could be? Thanks for sharing!

Now that was good. I'd never do it, but it was good!

You're amazing Life saver Thank you ❤️ 👍👍👍

Nice explanation! Thanks

Thanks for sharing that tip! . Bad at trouble shooting skills on my side

This helped me a lot. Thank you

This was very helpful

This worked, wire to R and G and the fan turned on. Bad thermostat. Going to buy a new one. Thank you!

What a blessing... this video!

Best video ever.

Thank you very much for your video. For the cooling setting, my ac system keeps running and cannot be turned-off. What cause these problem?

Great explanation

Thanks man! This worked for me

Very good video

Mr. YourSelf: Thank you very much for your great videos! can you please make short video on outdoor unit short cycles reasons?. Thanks

Thanks, so helpful.

If it says Honeywell on it, it’s bad.

I definitely agree these are safe ways of testing a thermostat but honestly I would change batteries 1st if no change then I'd buy a cheap $15 dollar thermostat and see if it makes a difference because having a back up never hurts. But all this does is remove the thermostat from being a problem most of the time it's a broken or loose wire, blown fuse, or another cheap easy to fix part the expensive part of heating and cooling always comes down to labor cost and usually doubled hourly rate for emergency calls

thank you man!!

@YourSelf I have experienced some Honeywell thermostats which partially works and doesn't! Some will work only in the cooling section know as the RC. RC will make contact with both G (Fan) and Y (compressor) not in the heat mode between R & W for heat Or Vice versa!

Thank u so much!

Good video helped me troubleshoot down to what the cause of my problem was. It was a 15 amp fuse on my furnace on and off switch it was blown.

Thank you for your video. You have mention about C terminal and batteries. Question 1: Without batteries, I wouldn't able to see the temperature numbers. Is it a good idea for everyone? Question 2: With the batteries and C terminal, can I have both of these items?

thank you nice and easy

Thanks. Help me alot..

You're the best thanks.

When I press the arrow, nothing happens anymore. Only when I hit "set" I can change temps. Also it's ignoring any set temps and is cooling for hours without stopping.

I have the same problem thank you very much

Excellent!!! Thanks!🙏👍

Saved me. Thanks

Thanks

Great video. Question: I put in fresh batteries. But the heat furnace does not go on when Thermostat is on "Auto" and I up the temp above room temp. But when I put Thermostat on 'Manual Fan", the fan turns on. But it only circulates air, not heated air. Do you think it's my Thermostat or the furnace?

Great Video

Great Job,but I changed the battery of thermostat but it still blank no works.

I have a green wire in W and a red wire in Rc... I've had an electrician come out and fix it but its usually stopped working after about a week.

We have the same Honeywell thermostat, ours only show inside temp, nothing else and it doesn't respond to any button presses anymore. We checked the breaker but that's not the issue.

When I turn on cold the inside temp appears on left side of thermostat and nothing happens. I turn on heat and heat works. Why no cold?

Wonderful QUIET !

I think I missed something. I have an upstairs thermostat that doesn't work but my downstairs works fine. I tried the steps and nothing is happening. I need help 😫

I tried everything you said, and still no heat. But, then again, I haven't paid the gas bill in months.

But what happens after clicking hold and everything looks fine but it decides to go back. Like I want mine to be at 70 and I do as you instruct but after a few seconds, it goes back to 84. And it keeps climbing up. Help?

Thank you.

Thank you for sharing vid, I did just that changed batteries. But what is strange heats on all day and turns down at night. Question, on the back shows Electric or Heat Pump....or Gas or Oil? Mine is in Gas

Thanks for your help. I have a single pole thermostat going to wall heater. I have replaced the thermostat two weeks ago and now it will not operate the heater. If I remove thermostat and cross wires the furnace kicks on so nothing wrong with furnace. This is the second time I've replaced the thermostat in 2 years. Do you know what I'm doig wrong? Thanks in advance.

Thanks a ton!

Good stuff

It worked 😊 thanks!

I have the same thermostat :)

Is it safe switching to on.

Great video👍thanks

What does it mean if the "set to" temp and "heat on" is crazily blinking? It doesn't do that when it's over on cool..? It's a weird blinking and the "set to" temp is also blinking the temp up and down by a degree or two. It does take batteries, but there were no batteries when we bought the home a year and half ago. It's hardwired. Can you help? Is it the thermostat or something else? Thank you!

Mine was the clicking noise from the reverse valve. Honeywell is doesn't like colmens hvac.

Heat in one zone on boiler won’t shut off with thermostat

I have a Honeywell RLV430 for an electric baseboard heater in my bathroom. It says 32 deg but backwards on the screen. Doesn’t take batteries, tried everything but it just won’t come on. Starting to think my thermostat is bad. Any suggestions. Also will not reset

Thanks for the great video! Question for u. Our thermostat Keeps turning the fan on and off as we usually keep it on auto. The furnace downstairs seems to be working as we are able to turn the heat on/off however the fan keeps turning on then a few mins later back off. We put new batteries that doesn't seem to be the issue. We removed the thermostat off the wall completely and it is still clicking itself on and off. Is that a thermostat issue or a wire issue?

I have almost the same thermostat just not programmable. The temp reads 76 when off. If I turn on and set lower than temp reading it will shoot up to 81 degrees even while blowing cool air. The light on the thermostat will also flash on several times while running, not cycling on and off. Please advise.

So I have the exact same unit and I set mine to 77, my air has been running for 40min now and it’s been 77 almost the whole time and it won’t shut off

How do I change from Celsius to Fahrenheit it’s stuck idk how to go back

Will the paperclip trick work even if my thermostat screen isn't working even with new batteries

My problem is my thermostat is directly across from my inside unit I also have the outside AC fan but the problem is when I plug in the unit across from the thermostat it stays on whether or not I flip switches off on the thermostat how do I fix that

Mine is ac is working fine but when you set the thermostat to say 72 or 73 when the house temp is 71, it just won't cut off it keeps blowing cold air

Mine is blowing. Air just isnt getting hot. Cold as hell in this house. The pilot is lit and filter is changed. Played with the breaker, reset the thermostats. What could it be?!

Welome to RU-vid G

or u may have a thermostat that stopped working, u change batteries (that u changed last month), but it wouldn't let u select temp. When u messed with it and it finally did, u put it back in place set on 50, selected heat and auto and WOW the thermostat lit up and rolled thru the #s quickly til it hit 90 degrees. Finally stopped but I stupidly put it back in place & went to bed, woke up in a pool of sweat and yep furnace running wide open at 90 - so much for hibernating in a room for 2 months with a space heater to keep my bill down. Never seen a thermostat so screwed up but never used honeywells - they're CRAP

Our furnace wasn’t coming on. Thermostat had no led readings on it, pulled the cover off and replaced aaa batteries. Still no led readings so removed batteries and they were very hot! Not sure if thermostat needs to be replaced, any thoughts?

Gas company came over and checked the furnace, and glass it’s working great. But I can’t get the heat to reach the set temp, it seems to be stuck between 17-19 degrees Celsius.

I have one wire going to rc and no c wire connected. How do i proceed instead. My issue is it kept turning back on with or without the face of thermostat without staying off.

My thermostat will black out & sometimes will not reach temp set for heat. Have had no problems with air.

If we have the same issue as this video what can be the problem. I replaced the thermostat and still nothing turns on. I tried junping it from the thermostat and nothing. Not getting 24v to thermostat. I jump it from the main board and it works fine only.