I was just getting ready to call the HVAC repair folks when I found this video. I checked the batteries in the thermostat and found they were corroded. Once the batteries were replaced, the thermostat worked perfectly. Thanks!

For me it turned out to be the drain pan in the attic. Thank you VERY much! You are beyond awesome!

I watched your video, went to the reset breaker and that was it, even though the breaker seems normally at ON, I switched it to OFF then ON again and the thermostat came back to life. Thank you!

A few words to say thank you for your video, it helped me resolve the thermostat problem. Much appreciated.

Thank you so much. Easy to understand, simple to do. It was the batteries. My service rep was going to charge 89.00 plus any parts that needed to be replaced.

Thank you sooo much! I checked all 3 and turned out to be the drain box, it was full. empted it and it all came back on

Thank you so much! I checked all that you suggested and it ended up being the heat circuit breaker. I just turned it off and then on and my Wi-Fi thermostat rebooted and reset. You saved me a technician call out fee. You are awesome!

Thank you so much!! Your video was a lifesaver!! My device doesn’t have batteries so I flipped the breaker switch for heater and it worked!! My screen came back on and I had AC again!! Never would have guessed it was the heater breaker. Can’t really be going without AC in these hot Texas summers!!

Thank you, I tried everything, and then saw your video. I thought why should I reset the breaker when it's not tripped. But I did, per your instructions, and now my furnace is working perfectly again on this chilly morning. Big thanks!

Thank you sooooo much!!! I have to admit that I skipped checking the battery and went straight to the heat circuit breaker because we had a pretty bad storm today. Thanks for the great advice. 😊

LIFE SAVER!! I never would have guessed it was the heat one that needed to be switched. THANK YOU!

My condenser pump failed, and my drain pan was full of water, which tripped the overflow switch. Thank you for your help!!

Thank you so much it was the water censor and pipe clogged...fixed in minutes....I owe you one

Very good simple advice. Mine was the circuit breaker, switched on and off. It’s fixed!

This was very helpful, thank you.

Thank you so much you saved my life, it was the breaker 🤦‍♀️❤️🎈

Thank you! Didn't know it ran on batteries. Changing the batteries worked for us.

Just the batteries!! Thank you so much for posting this!!

Thanks for the video!!! It was the battery. Very simple.

My split unit HVAC shut off and the Trane XL824 screen was blank/black. Checked all the circuit breakers (outside unit, garage, attic, & inside the unit itself (left side) and they were all fine. Needed it fixed so we called the HVAC guys. All they found was a 3 amp fuse inside the interior unit that had blown. No other explanation other than there might have been a power spike of some sort. Replaced the fuse (this is the same type fuse you find in automobiles with the two flat prongs), flipped the power back on and everything was back to normal. Got charged $218 for the repair (holiday rate). The 3 amp fuse itself was billed at $18! If you have this same problem, power down the unit, remove the panel over the internal circuit breakers and check this fuse to see if it's blown. Replace if necessary. Hope this helps you avoid the same situation we found ourselves it.

Yes! I watched your video and troubleshooted my "blank" thermostat by just following your instructions. Not bad for a woman who knows nothing about thermostats. I am so appreciative!

It was my breaker. It didn't show it had tripped but shut it off and on again and it's working like new. We did have a pretty good thunderstorm yesterday with alot of lightning here in Northern Texas. Thank you very much for your time and expertise.

Leaving the circuit breaker off for 30+ minutes seemed to help. Thank you!

This video saved me tonight!!!!! Thank you thank you thank you!!!!!

Thanks a lot for your suggestions. It was the heat breaker for me as well. It wasn't tripped but once I reset it, display came back. It was marked AH in my circuit breaker.

Thank you so much for this video ! Definitely the batteries !

God Bless you. you saved my family

Thank you…Your video solved my problem😊

Thank you, i found my daughter who was visiting from LA had accidentally tuned off the furnace switch next to light in the attic when looking for an extra suitcase. Its a two story house and I had been having problems for past five days with no display showing on lower floor thermostat. I changed the batteries twice and made sure the terminals were clean. I also flipped the furnace breaker off and on in the garage. For the first time in 5 days the outside A/C for downstairs was on. We just got home for a quick trip from Houston to Galveston for one overnight stay for Mother's Day and were major bummed because when we entered the house this evening at around 8 pm both downstairs and NOW the Upstairs thermostats were registering 81 even though I set them both to 72 when we drove down. The furnace switch was accidentally turned off just before we left. So for now 20 minute late downstairs temp had dropped from 81 to 75 and upstairs from 81 to 78 with the former blank screen downstairs registering now. I also checked the pans which had no moisture from overflow and were completely dry. So hopefully your recommendation worked. I really do appreciate your video and great advice. Carl T in Houston.

Thank you so much. I must have moved or touched the drain pan switch cleaning around the AC unit. It was sticking up!

Thank you, thank you thank you!!! We woke up to a cold house. Husband is recovering from hospitalization, and at 75, he is always cold. I found your you tube, and tried the first thing you said, change batteries....IT WORKED! SAVED US $$ AND STRESS. 3 DAYS BEFORE THANKSGIVING.

Thank you! That was very helpful!

Helped fix mine. Thanks!!

Thank you so much!!! We just changed the batteries and we're good! You're a life saver!

Thank you!!! it was the drain sensor...just scooped some water out and it turned back on!!!

Thank you!!!! I had accidentally bumped the furnace switch in the attic.

Life saver, thanks

THANK YOU VERY MUCH!!!!!!!

Thank you so much, pan was filled with water.

This video was a lifesaver! 🙏🏻

Forgot about the pan level switch. Thanks!

It could be a bad thermostat, and it's easy to check in a house with two or more separate systems, all likely with the same model thermostat. Simply swap a good thermostat in place of the suspect thermostat (two screws and four color-coded wires). My replacement came from the less-used attic system and got us heat in the living area. Meanwhile, a new Emerson NP-110 thermostat will cost $18.

Thank you !

Thank you so much

Thank You

thanks - yes it was the drain pan moisture detection switch set off by today's high humidity - I had forgotten about that switch! I put a piece of kitchen towel under the switch which might help

There are also fuses on the circuit board, could be in line, which might be blown. I looked at 23 youtube videos on this topic today and amazed not one mentioned this blade type fuse. That was our issue. Replaced and everything is working now, canceled appointment with HVAC person. 75 cent fix.

Thank you so much,screen was blank /water drain had clogged and shut system down

Thanks! Funny, I have been here for years and this happened fir the first time! It was the batteries

Thank you! In my case it was drain

I cleaned the it. Might need batteries think it's maybe old sugestion on good long ladting batteries?

I replaced batteries I did the thingy with the breaker switch for the heat still no display I even checked the pvc pipes for water no water I changed the filters every month it’s not that .could it be time for a new thermostat ?

It was the batteries! Yeah!

Thanks. "What does "check the batteries" mean? Yes, it has batteries, so what? 😂

My thermostat goes blank most of the time, and comes back on occasionally. Any ideas on what to do?? Thanks I replaced the batteries, same deal.

Where is the pan located

Mine was the furnace door switch was not making a connection when the door was closed. Had to play with it for 20 minutes to get it connecting properly again.

We turned off the circuit breakers and it did not turn back on the blank screen of the thermostat. checked the batteries they’re fine, where is that water pan? The fuse box are in the basement, the air conditioning system is outside, there’s no attic to go to, where is this water pan at with the switch please? 90° today please, help 🙏🤝❤️

Had mine go blank and replaced the batteries and cleaned drain pan. Still didn't work. I almost gave up when I realized there was some corrosion on the battery terminals I cleaned them off then it started working again.

What if only the blue backlight wont come on ??

have a Lennox XP25 with a 10f81 thermostat. My numbers all disappear between the hours of 4 am till around 10:30 am. Then it comes alive again. Recycled everything. Does it even if system is off. I won’t call an expensive tech if the problem isn’t happening when they get here. A wasted service call. Frustrated. Not wifi related. Disconnected it from WiFi.

I can't find a drain pan or overflow switch. I also don't have an open pipe outside to vacuum the piping if something is blocked. . I'm freaking out. I changed batteries. I reset power. And I can't find any drain pan or the overflow switch. I just have a furnace with no pan. And I don't have a pipe with a float switch

What if my thermostat didn’t have batteries in it for the last year & half & it just went blank & stopped working . I took the thermostat front off & seen it never had batteries but it does have a place for batteries. My question is should I just put batteries in it although it has worked without batteries or do you think it could be something else & I should just get a professional

Can someone pleeeeeease help me? 😢🙏🏻🙏🏻 My ac unit was reset by accident. I used to have it set at 77 and at 79 is when it would turn back on. I want it like that again! 🙏🏻 I just don’t know how to set it back to that? UGH! 😩😫 Can you please help me? In other words I had it set 2 degrees higher than my set temp at 77 so it would turn OFF at 77 but turn back on when temp in house would reach 79 and I really want to set it back like that! Does anyone know where is the setting that I need to do please? I have a Nexia American Standard 624 thermostat

I have a t3 Honeywell thermostat with only 4 wires red, green, orange, yellow how would i wire that

My drain pan was dry, but I added some white vinegar to the drain line and that loosened a clog and allowed my thermostat to start again

My daughter has a carrier unit. The thermostat will go blank and then the unit starts a clicking noise. You have to turn the thermostat to the off position then back on to get it to wake it up.

Thank you, the drain box was full of water.

So you show the first 2, but not how to find/fix/empty the drain pan. Thanks.

Who do you check the battery.. wth, you didn’t even let me see how to do that..

Thank God for Google

Thx miley cyrus

The drain pan how would that make the screen go blank lol

00:22 I wish I could check the state of batteries just by looking at them too.

Hii

She's cute

The replacing the battery thingy is just wrong. Each thermostat is hard wired to the house electrical system. I woke up this morning, with the thermostat blank. Since it's hard wired, it's obvious, that it's not getting power. I put batteries in the thermostat, to see what the temp was inside the house, but other than that.....the batteries DO NOT start the furnace, if the thermostat is not getting main power from the house electricity. In my case, it's probably the thermostat that went kaput. I'll be calling a service person shortly, when they open.

Okay kids, are you ready to play "spot the lesbian"?

Talks about how it could be the breaker but doesn’t even bother to show that process what a joke no help…

Thank you so much. I must have moved or touched the drain pan switch cleaning around the AC unit. It was sticking up!