Furnace or Air Conditioner Thermostat Blank - 10 Reasons Why

Is your home furnace or air conditioner HVAC thermostat screen blank and you have no idea why? In this video I go over 10 reasons why a thermostat could go blank on you and luckily most of these are very easy problems to fix. You should be able to get your furnace or AC back up and running in no time. I also mentioned some of my other videos, here they are for reference:

Basic Thermostat Wiring:
Thermostat Wiring Diagram Explained:
How to Replace Circuit Breaker:
AC Tripping Breaker:
All Air Filter Questions Answered:
How to Find Low Voltage Short:
Furnace Overheats, Easy Fix:
10 Reasons Why Furnace Overheats:
How to Clear A/C Drain Line:
How to Replace a Thermostat:
How to Install Nest Thermostat:
Nest No C Wire Solutions:
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⚠️ Disclaimer:
This video is for educational purposes. All appliance and HVAC repair work should be done by a trained professional. Word of Advice TV is not responsible for any possible damages or injuries caused by the use or misuse of the provided information.
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#furnace #airconditioner #appliancerepair #heating #airconditioning #hvac #wordofadvicetv #thermostat

[WordofAdviceTV]

➡ Video List For Reference:

Basic Thermostat Wiring:
Thermostat Wiring Diagram Explained:
How to Replace Circuit Breaker:
AC Tripping Breaker:
All Air Filter Questions Answered:
How to Find Low Voltage Short:
Furnace Overheats, Easy Fix:
10 Reasons Why Furnace Overheats:
How to Clear A/C Drain Line:
How to Replace a Thermostat:
How to Install Nest Thermostat:
Nest No C Wire Solutions:

[mjohnslo]

These videos are a gold mine of information. They allow home owners to resolve simple issues (and better understand their home) without having a technician charge $80-$125 to flip a switch. Saves embarrassment also LOL. Thank you sharing these videos, I really could have used them earlier in my life!

[rzh]

A month ago, my neighbor's AC unit would not engage. He called the HVAC people to come. They came, investigated (?) and blamed the thermostat as being defective ( almost new Honeywell WIFI version). I gave him my "old" battery thermostat (replaced with an ECOBEE by me, after watching your videos). The replacement didn't work either. I went to the outdoor unit and found no 24V signal, and then to the control board and determined ( per your videos) it was still functional. I pulled the 3A fuse and, voila, it had blown. Put in my spare and the AC fired right up ! What had happened is that they had a painter in and he removed the thermostat without shutting off the power. The fuse saved the board. And, yes, I have been guilty of accidentally flipping the furnace switch off, but now I always check that first !! Thanks for all you do.

[mayito_]

Jay, I finally repaired my HVAC, I'm so happy.
I followed your videos and it helped entirely.
I'll share with you my experience as it was an entire adventure:

First the AC unit was not cooling. When checked outside the fan was not getting any signal to be turned on, so I thought it was just a change needed in the capacitor. I went to home depot on a friday 7pm and I got extremely pissed becaus they don't have anything in physical for hvac, and online takes days to deliver. So we gave up and went somewhere else to sleep for the night because it was so hot.
Next day in the morning I looked for a hvac parts store and found one, and bought the capacitor. I followed your videos, I installed it, and it "worked". The fan was now not spinning! I took the motor out and it was so jammed and rusted, rushed back to the hvac store to get a new motor, they gave me a "universal" motor with 4 cables (my old unit had 3 cables). Followed your videos, cut the brown and white as you instructed, reconnected everything (sounds easy but took hours to even pull the fan out of the motor it was extremely stuck). Even your technique of using sand paper worked beautifully. now with new capacitor and condenser fan motor it was the moment of truth. I turned on and it wasn't spinning!! I thought I was lost because I thought I had done something wrong and was about to give up and just call a techinician. I checked more of your videos and found how to bypass the termostat by using the contactor. I pressed the contactor and it worked! the fan started spinning and immediately started cooling, BUT the contactor wasn't staying plunged. so now I checked your contactor video, had to run again to the hvac store, got a new contactor, followed the instructions again reconnected the new contactor and BAM everything was working perfectly!! I was surprised how everything worked and how by just looking at your videos we did it!
I should say that, a technician did really came to our place before, but he was charging us 2-2.5k because he said the compressor was old and not working and is better to get a new one. But that sounded sketchy AF.
Anyway, I'm extremely happy everything worked and I now feel confident to engage into more repairs myself
Thanks!!
PD: I spent 123 dollars in total.

[stevemcmahon]

Thanks for your video. We had a repair guy out. He said he fixed the issue. Then it stopped cooling. He came back said fixed again. Then screen on thermostat went blank. Could not re-set. The repair guy left the panels off, but I did not think anything of it because it was working. I thought the button was a re-set. Your video showed me it was the panel switch. I found some tape that had come off the switch. the repair guy had taped it so he could see was up without having to put panels on. Then he left. The tape came off and shut the thing down. We have been without air for over a week in a heat advisory. Maybe tonight we have a full night of air. Thanks.

[CactusJack-ppgk]

Thank you so much, great information. My furnace switch was off, turned it on and bam all good.

[secretlifeofa]

It worked! I had no idea I had accidentally switched the furnace off moving stuff around in the basement. Thanks so much!

[brucemoriarty]

I think I owe you thousands of dollars lol.I mean because of your honest videos I have saved a lot of money. Many thanks.

[gage-money]

You just saved me my friend!!!!

Honeywell WIFI thermostat was shut off and I never realized it, no power to it. I watched through your video and went and checked the circuit breaker, and I was on for the furnace. I then went and looked at my furnace switch down where my HVAC unit is, and it was shut off! I just had someone in my house doing a termite inspection, and he must have turned it off in his poking around!

Thanks for saving us!

[panthera]

I have an Ecobee thermostat which went blank. I watched this video and also a few more videos about Ecobee. I just pulled out the unit and plugged it back in. Voila ! It rebooted and working !

[stephcarrin]

Thank you for this video. Back to detective work. Much needed. 😊

[TM_Stone]

11. Didn't pay your electric bill.

[CesarLim-ys]

Accumulated dust debris clogged the drain and switched open the overflow safety switch, and turned off the thermostat. I pushed out the debris and manually reset the drain switch. Thermostat automatically reset itself. It’s been 95 F when this happened. Thank you for the valuable information.

[mukhtarbakhshi]

A great presentation, self explanatory and very easy for DIYs try troubleshoot!!!
Before watching this video, I already tried out a few things of my own, will follow up on this video, hopefuly I am able to bring my thermo to life.. Tnx a lot.

[cheyennegowan]

Really helpful saved my family money
Thanks

[MAGAMAN]

Those bad jokes are probably one of my favorite parts of these videos.

[kaundabwalya]

As Usual explained super super well 💯.. Thanks Man 🙏

[paulrozinski]

Another helpful video Jay, keep ‘em coming. Stay well my friend . 👍🙏

[chrissauter]

There is another way to verify if the problem is the thermsotat itself. Unplug the furnace or turn off the power switch first amd foremost. Then remove the thermostat. If summer, take cooling wire (normally yellow) and power wire (notmally red) and twist them together. You need to make sure that they are the correct wires by looking at the wires on the board. If in winter, use power wire sgin but this time you want the heating wire (normally white). Again verify you have the two corrdct wires. Then re-apply power. If ot cycles through correctly, then the problem is the thermostat. I have used this many times in the field and in my own home

[izzymoney]

Great tutorial keep the videos rolling my friend 👍