How to tell if your home thermostat is bad

[@aaronsmith5433]

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"!

[@rebeherdez6515]

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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@Your-Self]

Too bad the HVAC tech couldn't tell you to change the batteries, but I'm glad you fixed it yourself!

[@HsingSun]

If that AC guy told you just to change the battery, he couldn't make $110.

[@katz734]

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.

[@Your-Self]

Good to hear it!

[@KaiNahLyria]

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!

[@Your-Self]

Glad it helped!

[@alenajames5309]

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

[@Your-Self]

Glad I could help, and thanks for watching!

[@Bergarita]

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!

[@rachelmcgowan384]

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.

[@debrasmith6747]

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 🙏🏾

[@Your-Self]

Glad I could help

[@estherrodriquez4772]

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

[@Your-Self]

Thanks for watching!

[@gregskuza7166]

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

[@Your-Self]

LOL, thanks for watching!

[@jocelynnebruce7894]

That was funny

[@matthewmassengill7163]

...As an electrican I'm this is all hvac guys stuff

[@sandrapopplewell8944]

@@Your-Self in

[@edzimmerman5591]

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

[@Your-Self]

Glad it helped!

[@winstonchaychel]

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!!! 💜

[@Your-Self]

Great to hear it, and thanks for watching!

[@polishmamacooks1019]

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.

[@Your-Self]

Thanks for watching!

[@cbro777]

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

[@Your-Self]

Great to hear!

[@H.pylori]

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

[@Your-Self]

Glad it was helpful!

[@melissaconnor3729]

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

[@Your-Self]

Great to hear!

[@gregblack2628]

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

[@Your-Self]

Nice work!

[@rolandorodriguez9821]

Very helpful. You make it easy to understand

[@Your-Self]

Glad to hear that!

[@Earlvis]

If it says Honeywell on it, it’s bad.

[@mannycamacho3892]

This

[@JMAC____]

Yep

[@mohammadfahimnaimi4222]

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

[@Your-Self]

Glad it helped

[@HsingSun]

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?

[@Your-Self]

If your AC keeps blowing air and actually is cooling, the condenser contactor could be stuck closed (welded). Research AC CONTACTOR.

[@toukaK]

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

[@Your-Self]

Glad it was helpful!

[@Bullybeef972]

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

[@Your-Self]

Good to hear it!

[@benchesoftreblecarolyn9147]

Fantastic! Thanks 😁. And I love your voice 💜

[@Your-Self]

Thank you too!

[@purpledancer4914]

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

[@Your-Self]

Thanks for watching!

[@3613jeremy]

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

[@Your-Self]

Thanks for sharing.

[@HsingSun]

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?

[@Your-Self]

You need either batteries or the C terminal connected for the thermostat to work at all. But it's best to have both in case of a power failure, so you don't lose your programmable thermostat settings.

[@Hi-Tech-Ray]

@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!

[@Deteroblix]

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?

[@juliangarcia7557]

Ok

[@Vanessabobessa10]

My exact issue

[@jsmith5764]

Very well done video. Thank you

[@Your-Self]

Thank you too!

[@christinarivera2054]

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?

[@kimbelanger1113]

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?

[@KMHrock89]

(Not an expert) make sure there is a jumper between R and Rc.

[@zackstanton4654]

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.

[@johnnyjones7798]

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 😫

[@kathleenvarey6656]

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?

[@Your-Self]

Did you put batteries in with the correct polarity? I'd take the cover off again and experiment with batteries. The LED screen should light up in your hands, even before you put it back on the wall. If the LED is dead, try other batteries. Otherwise, the thermostat is bad.

[@djroks6325]

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.

[@AMomsLife316]

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!

[@justanotheramerican8394]

Thanks man! This worked for me

[@Your-Self]

Great to hear!

[@MrNouhshishani]

Best video ever.

[@Your-Self]

Glad it was helpful!

[@murdamuzikmayhem4972]

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.

[@laylaismail6149]

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?

[@Your-Self]

If you have a single thermostat and removed it completely from the wall, this could be a wiring problem or computer board in your Furnace/Air Handler problem. If you removed just the face plate from the thermostat, the problem could be with the back plate.

[@TheDylonias]

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

[@juvenaldominguez7022]

You're the best thanks.

[@Your-Self]

Thanks for watching!

[@theresagray5194]

I have the same problem thank you very much

[@Your-Self]

Thanks for watching!

[@smiley6173]

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

[@Your-Self]

If you have gas-furnace, keep the setting on Gas/Oil.

[@wesleymcgee2856]

What if it electricity

[@raulrobles2961]

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.

[@Your-Self]

Possibly a broken low-voltage wire inside the wall. When you remove the thermostat, you should have a spare wire twisted behind it. You could try installing that wire instead of the red wire on terminal R. And install the same wire color on the main board on terminal R as well. If that doesn't work, you may need to feed a brand-new wire cable through the wall... not fun.

[@raulrobles2961]

@@Your-Self you were right. It was the thermostat wires. Ran a new one and worked fine after I did the connections. Thanks

[@shihanrehman]

Hello. My A/C works fine, however, when the set temperature is reached, the compressor and fan don't turn off together. Only the compressor turns off, and the fan blows continuously, and I have it set to AUTO. When the temperature goes back up again, the compressor turns on. But fan is running 24/7. Could this be a thermostat to relay issue?

[@Your-Self]

The thermostat switch from AUTO to ON could be stuck internally, so the thermostat needs to be replaced (try wiggling the switch back in forth vigorously to unstick it first). Or it could be a wiring issue. If the wire from the G terminal is touching the wire from the R terminal, the fan will continuously run. These wires without the insulation could touch inside the thermostat, inside the wall, or inside the Air-handler/Furnace.

[@FreeMan-mk2rk]

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

[@Your-Self]

With a paperclip. you are bypassing the thermostat. So the AC should work. If it doesn't, you may have some other issue besides the thermostat.

[@jhensinethomas7110]

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

[@xx-nr6lu]

Excellent!!! Thanks!🙏👍

[@Your-Self]

Thanks for watching!

[@mrs.kendramalone118]

Thank u so much!

[@sungleong]

what about when I turn to auto, there is no air. when I turned it to on and Cool, there is air but the air is not Cool, it's just fan air. what is the problem here?

[@3buzybeez]

Yep, that's just air like a fan. Freon? compressor? You better call in a professional, sorry :

[@zoot21suit]

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

[@lewisgraham4239]

thank you man!!

[@mk-jl3zd]

Thanks

[@johnnyrocket9372]

I have an issue where my cooling tower constantly runs. A service tech said it could be the thermostat, but did not sound certain. What would your thoughts be?

[@3613jeremy]

I'm not sure exactly what your referring to with cooling towers I've never Hurd of a residential cooling tower there usually part of some kinda industrial application like nuclear power plants and all a thermostat does is control the power on and off when a set temperature is called for

[@lusrodriguez8769]

thank you nice and easy

[@Your-Self]

Thanks for watching!

[@MsGreenInspector]

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

[@avalavendar3497]

But what if there is no C wire connected? And I take the front part with the batteries off?

[@Your-Self]

The C wire is not necessary as long as you have good batteries installed. And for testing purposes, we don't use the C terminal.

[@Floridaburg-]

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

[@ixcancel]

Great Video

[@Your-Self]

Thanks for watching!

[@jatx2010]

Saved me. Thanks

[@Your-Self]

Glad it helped!

[@Vanessabobessa10]

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?!

[@yahairacorea1915]

Hello where can i fine that exact thermostat please

[@MrJLee-ri3so]

Our thermostat was acting up, furnace would turn on sometime. First tech wanted to sell us a new heater. 2nd company that call was honest. First he check the heater in the garage then checked the thermostat n diagnose a bad thermostat. $240 bill, money well spent

[@Your-Self]

Thanks for sharing.

[@Podcastforthewin]

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.

[@Your-Self]

If your furnace continuously runs, maybe the duct in the attic or basement is torn/damaged or partially disconnected so you are losing some warm air to outside. What is your thermostat is set to, and what is the temperature outside?

[@Podcastforthewin]

YourSelf it’s currently -18. It seems to work fine until it gets cold out, and than it won’t reach any higher. Maybe I should check the venting.. thanks

[@kateisnotgreat34]

hi! Idk if you'll see this but my thermostat just won't turn off, It's been on off for ten minutes now, but air is still coming out, if anyone has any advice that would be wonderful, thank you.

[@jamiebills9043]

Make sure the fan is on auto and not on

[@ashleyadam955]

My acid not working how can fix I am very I need some cold air

[@AinsleyVarvel]

My problem is that I just replaced the batteries 2 weeks ago and now the thermostat is already dead again. Is it safe to assume the thermostat just has excessive power draw and needs to be replaced? Or might there be some other issue?

[@Your-Self]

Have you tried freshly-bought batteries from the store? Could be old-stock batteries. Also, the rechargeable batteries don't work well. You need regular Alkaline. Were the batteries too easy to remove from the thermostat? Maybe the terminals are too loose and need to be adjusted to make them tight.

[@AinsleyVarvel]

@@Your-Self I'll check the terminals but i don't believe it's that. It was a fresh pack of batteries too. I appreciate the response.

[@yeseniarangel1421]

Please help.. we have the temp set at 72 furnace will turn on and off throughout the day and heat will blow but won’t go past 64 degrees.. we noticed as the days get colder the heater won’t go past that, temp it is currently 14 degrees out.. when days were a bit warmer about 40 degrees the heater would heat to the desired temp.. Could this be the thermostat??

[@Your-Self]

The most likely cause is a dirty air filter at the furnace. Try removing the filter for an hour. And if it starts working better, replace it with a new one.

[@aaronconner1187]

I did the paper clip trick from your video and it blew air out. So I replaced the thermostat, but A/C still isn't working. Anymore suggestions???

[@Your-Self]

Is your AC blowing air but not cooling, or not blowing at all? If not blowing at all, try the paper clip again... maybe something is not connected properly.

[@aaronconner1187]

Yes it's blowing air but not cooling. We are in the middle of a heat wave and it's miserable.

[@aaronconner1187]

Also, thanks for the quick response. I wasn't even sure if I'd get a message back lol

[@Your-Self]

If your indoor fan is running, the problem most likely is outdoor in the condenser unit. It could be a bad capacitor, fan motor, contactor, compressor... it gets pretty complicated there.

[@aaronconner1187]

Ok... Thank you

[@jeffalexander1965]

What if the thumastat says change the ball ?

[@HsingSun]

Why did you set 82 degree when you wanted to turn heat on?

[@Your-Self]

You need to set the thermostat temperature higher than the room temperature to start the heater.

[@HsingSun]

@@Your-Self OK, thank you.

[@JimEverette]

Emerson easy reader blue screen thermostat just clicks 3 times and doesn't start heat or ac

[@ginom8450]

I just tried and it appears that my batteries I had replaced were still not good. Just put new ones and it seems to work. If it does got ripped off by ac company

[@kennethwilson7056]

My thermostat runs the fan on furnace but outdoor ac unit won't switch on,already replaced capacitor,any help out there,Thanks in advance!(also has jumper already installed) new batteries in thermostat also

[@Your-Self]

Weak batteries may not be able to close the Contactor outside. A bug or an insect could be squashed inside the Contactor, so it can't make a good connection. One or both thin wires running from the house to the AC condenser outside could be cut, chewed, or loose. Tripped high voltage breaker. Is the compressor running, humming, but the fan doesn't, or totally quiet in the outdoor unit? Did it ever work before, or you just moved in and don't know the history? And what jumper are you talking about, R to Rc?

[@kennethwilson7056]

@@Your-Self it worked last summer fine, so I put in a new capacitor still nothing but when I depressed the plunger on the contactor by hand the AC unit turns on but the contactor won't pull in when I use my thermostat in the house to start the AC there were no bugs between the contacts and the jumper I'm talking about was inside my thermostat inside the house

[@Your-Self]

*** looks like my reply didn't go through, here is a copy*** So the A/C works, that's great. Now you need to make sure the Contactor receives about 25 VAC (on the thinner side). If you see the voltage but the plunger is not closing, replace the Contactor. If you don't see the voltage, trace it back to the house to figure where you are losing it. (Working with electricity could be dangerous so if you are not comfortable, please call a professional.)

[@kennethwilson7056]

@@Your-Self hey all good traced the low voltage wire to a cut wire from remodeling basement works fine now Thanks

[@debraades2448]

Thermostat is set at 72. Room temperature is 68. I move the heat button to off then back to on it runs for a little and shuts off could it be the thermostat

[@Your-Self]

I'd increase the temperature to about 80F. If the heater acts the same, the problem is probably the heater itself, not the thermostat. Check the furnace/air-handler filter, it could be clogged up.

[@Moke_one_kanobi]

Welome to KZbin G

[@marlostanfield1946]

Do you turn the power off from down in the basement

[@Your-Self]

For this test, the power should be ON.

[@marlostanfield1946]

@@Your-Self what does it mean when the thermostat will not power on unless batteries are installed.

[@Your-Self]

If your C terminal is connected but the thermostat has no power, check/reset the breaker. Next, the overflow-switch could be triggered in your Air Handler (furnace). Make sure the condensation water goes down the drain easily. Maybe the small fuse is blown. But in this case, it's best to call a tech to look for a short.

[@marlostanfield1946]

@@Your-Self 🙏🏽 a lot

[@chevyss18]

Mine doesn’t have a red wire ,,,it’s connected to the RC ,,,I have a white green and yellow

[@busyme4]

Hi, please help! My system ac works inconsistently, most of the time it blows cold air like it should. But on occasions for no reason the compressor will make a struggling sound and it starts but no cold air comes out, just room temperature... like a fan, it looks like I see this when we need it the most. Once the temperature is reading past 83 I will almost assure you the air will not come out cold.

[@Your-Self]

When your central A/C stops cooling and just blows room temperature air, go outside and look at the Condenser unit. The large fan should be rotating, if it's not, the capacitor inside the condenser is probably dying and needs to be replaced. If you are not comfortable working with electricity, please call someone who can do it for you.

[@busyme4]

YourSelf the capacitor was changed a year ago; so that’s the puzzling thing, we will have to pass it onto a professional I think. Thank you for your time and suggestion.

[@Your-Self]

If the capacitor was replaced by a cheap China-made capacitor, it could fail again in 1 year. However, if the outdoor fan is spinning, you may need to charge up the system with refrigerant, but yes, it's better to pass it to a professional. Good luck!

[@heyneshaaa2249]

What if the numbers dont show up does tht mean buy another face for it

[@heyneshaaa2249]

New batteries wont work . if its put on (ON) itll blow out a small amount of air

[@ministercarlos814]

Where is the fuse located?

[@Your-Self]

The low voltage fuse should be inside the air-handler/furnace.

[@jeffalexander1965]

What if the thurmastT says change the ball ?

[@Your-Self]

Do you mean change the batt? That means battery.

[@WV591]

Good job. tu

[@Your-Self]

Thanks for watching!

[@coriemclennan7126]

The thermostat is dead, changed the batteries, still nothing on the face. It is 90 outside. Help!

[@robrat4909]

My thermostat is hooked to live wire but is blank but if I put batteries then it turns on but ac still doesn't turn on...help please

[@Your-Self]

Check the breaker box, it could be triggered. If you have an overflow switch around the Air-handler/Furnace, it could be full of water. Clean the condensation drainpipe.

[@robrat4909]

@@Your-Self the switch is dry and none of the breakers were tripped

[@robrat4909]

Breaker was 1st thing I checked

[@Your-Self]

The live wire could've been cut, the fuse inside the air-handler popped, or the transformer burnt. May need a tech to look at it.

[@robrat4909]

@@Your-Self a tech looked at it and end up being the low voltage transformer in the handler which sends the power to the thermostat

[@JSmith-Not-Smythe-Dear]

82 degrees is pretty toasty.

[@michaeldeluca9306]

My thermostat is not turning on my system. I have a red wire to a “rc” terminal and I don’t have a wire connected to my G terminal. I also have a black wire connected to a “C” terminal. Can i still jump start the system?

[@malovobaby]

What did you do??

[@Sniper.925]

I got this one...my house is cold but it says it 79 in the house Want can it be?

[@Your-Self]

It's difficult to say what's wrong with it, without being there. But I'd try this: remove the front-plate (with batteries inserted) and put it on a table in another room for 10 minutes. If the temperature on the display is NOT going down to the correct room-temperature, the thermostat is bad.

[@Sniper.925]

YourSelf thank you

[@mattsharp2490]

What if I only have a G terminal

[@mattsharp2490]

What terminals do I need to connect

[@akshunrh]

My set to and cool on are both blinking ???

[@Your-Self]

"Cool on" blinking is normal for a few minutes while refrigerant pressure equalizes inside your AC. "Set to" I'm assuming is blinking because you need to CONFIRM the temperature you set it to.

[@Sniper.925]

I got this one and my heat keeps running

[@Pices3370]

If the screen of the thermostat remains blank it’s time to change it ????

[@Your-Self]

Make sure to use NEW regular batteries, not rechargeables. Verify the polarity (+/-). Maybe the flexible terminals are too loose, try to unbend them. The thermostat screen should light up in your hands before you even install it. If not, replace it.

[@carolpope66]

Work cold air but not hot air

[@nosoyono1081]

My problems is it won’t stop heating up with fresh battery’s

[@constancewilliams760]

What if c is not connected

[@Your-Self]

If C is not connected you need fresh batteries installed. To bypass the thermostat you don't need the C terminal, just use R and G.

[@megawhitesox0574]

actually 9 volts kills some people ....

[@treyvionarmistead8381]

😊

[@Earlvis]

If it says Honeywell, it’s bad. They have been putting out crap for years.