🍒 "Cool On" Is Blinking on My Home's HVAC/AC Programmable Thermostat (Honeywell)➔ How I Fixed Mine

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I recently tried turning on my air conditioner on my Honeywell 5 Day Weekday / 2 Day Weekend programmable thermostat (model 105841 / th4110d1007), which is 7 years old now, only to see the "Cool on" blink with nothing happening - the AC did not kick on, no air movement whatsoever. This video shows you my process and how I DIY fixed it (and how maybe you can troubleshoot fixing yours) so that it would turn on and work again. Of course, I'm not authority - always check your user's manual for your specific thermostat and hire an HVAC pro if you need to - be smart and safety first, always. Anyway, I hope this helps!
⚠️ THIS VIDEO WAS CREATED TO ASSIST YOU WITH YOUR PURCHASE/PROJECT. PLEASE CONSIDER ALL RISKS BEFORE BUYING AND/OR STARTING. YOU ARE RESPONSIBLE FOR YOUR OWN ACTIONS. THE MAKER OF THIS VIDEO DOES NOT ASSUME TO BE AN AUTHORITY AND, THEREFORE, IS NOT RESPONSIBLE OR LIABLE FOR ANY DAMAGE, INJURY, LOSS THAT OCCURS AS A RESULT OF VIEWING THE CONTENTS OF THIS VIDEO. ANY ACTION YOU TAKE FROM THE INFORMATION WITHIN THIS VIDEO IS STRICTLY AT YOUR OWN RISK. ⚠️
➡To earn your trust, please know that as an affiliate I may receive a small commission (at NO extra cost to you) for certain products that you purchase. However, as I personally own most products I review, I try to be 100% unbiased in any recommendations I may give. Additionally, I mostly recommend products that are only 4.5 or 5 stars (i.e. on Amazon). Thanks and enjoy This Better Home!

[@mindyhiggins1157]

It worked!! Thank you soooooo much! I'm a single lady and don't know much about AC's was so worried. It's cooler already!! Made my day.

[@ThisBetterHome]

Horray!

[@KM-oy5yh]

#AMEN SAME HERE 🙏

[@AlbertoFlores-wx2pl]

Literally vents started working when u said "wait" thank u!

[@mistymisfit26]

Thank you so much! I went into full panic mode when our thermostat started this and your trick worked perfectly no doubt saving us from a costly hvac bill. You are the best and a blessing!!

[@ThisBetterHome]

Glad this helped - thanks for your comment!

[@sherylclements2846]

You're AMAZING!! Your explanations are calm, simple and to-the-point HELPFUL!!! Dealing with 115-120 degree heat (Mohave County, AZ) . COOL light flashed, so instead of panicking, went to KZbin and found you!! Shut that puppy down for a little bit, changed out the batteries (they were near dead), and then after 30 minutes turned it back on. Cool air is flowing again!! YAY!!! In these extreme temps, units overheat easily. Am using it sparingly in the afternoon, and supplement with stand fans blowing over block ice frozen dish pans, which is helping. I have unit set at 84F to alleviate stress on it. HOT, but won't die ot the heat. Thank you SO MUCH!!

[@ThisBetterHome]

Ah, so glad this helped you! Stay cool!

[@themom111143]

This happened to me today and what I did was exactly the same things he did. Great minds think alike. Then I had to go pick up my glasses. When I came back, the thermostat was back to normal !!! LOL

[@donaldholden2090]

Fun fact! If it's actually wired properly, you don't need batteries at all. When you popped that thermostat off, did you see that blue wire connected to C on the terminal block? That stands for Continuous power. It supplies power to your thermostat from your air handler. Try popping those batteries out and sticking that thermostat back on to see what happens.

[@ThisBetterHome]

Great comment. I actually just installed a new wi-fi thermostat that does NOT have batteries - just the C wire. So, when power goes out, no backup and have to re-program everything.

[@donaldholden2090]

@@ThisBetterHome Are you sure? More than likely there are a few bytes of ROM inside that thermostat, so it should remember its settings even after losing power. They may also be stored on the manufacturer's servers, linked to your account.

[@kicks7402]

Thank you so much you saved me $6,500

[@yannlathro256]

Which model is this? I have the same exact one and trying to reset my batteries

[@Skywalker29]

Thank you I’m a woman and was panicking it most definitely worked 💪🏾🙌🏾🙏🏾

[@ThisBetterHome]

You're welcome!

[@esmatullah6982]

It really worked for me as well ! Thanks a million ❤

[@judge218]

Good video So I did this and it worked , however the air coming out is barely cool and not cold as it was before. Temperature is still stuck at 80 and not going down. Any suggestions pls would be great as the HVAC guys here just keep wanting to sell me whole new furnace and a/c unit without demonstrating what’s truly wrong with my existing units

[@tonshaad1230]

Same issue with me right now instead, it's at 84.

[@judge218]

Just to update: one of my dampers was stuck closed. Got new damper and now house ventilates and COOLS as normal. Maybe this could help somebody

[@vernroach3413]

The reason they build a delay into the thermostat is to keep the compressor for kicking on, then off and trying to kick on again...Not good for the compressor...It builds up high pressure on one side of the compressor, when running, lower pressure on the other..If it stops and starts, it struggling against the high pressure until both sides of it equalize in the system, then it will start...It has built in overloads, but they can burn to a crisp as well as the wire terminals if it happens to often...Makes it draw way to much current...ZAPPO...It's dead...HVAC man here.

[@ThisBetterHome]

Great comment!

[@manishtadvi4327]

Why the ac always always breaks on holidays or weekends

[@jessicacuellar9064]

Yup just got back from vacation after many flight delays to a hot ass house . 🤬

[@MsCankersore]

What about the model that doesn’t have but two up and down buttons? I can’t find the reset button or way to make it stop flickering

[@jakarlreed5839]

Just turn it off or take the thermostat off the walls and wait a few minutes it actually works

[@filmbuff1991]

The AC was out for 24 hours until a new capacitor was installed, then it started working again. House was 96 degrees on a hot July day! So it was on for 3 hours. Had it set to 76 but then decided to change it to 78 after 3 hours it was on. Then couple minutes after changing it to 78, it stopped and blinked cool on and house was 80 degrees at that time. But then after waiting it started up again. And now the house is 78 degrees!

[@mageliaacrip2086]

Help me out, it’s been 94 degrees for the past 24 hrs, my ac Not working at all

[@filmbuff1991]

@@mageliaacrip2086 Fan/motor still spinning? Compressor running?

[@mageliaacrip2086]

@@filmbuff1991 the fan outside is working, and my furnace is also working. It’s just the air isn’t coming out of the vents

[@filmbuff1991]

@@mageliaacrip2086 how about your compressor?

[@mageliaacrip2086]

@@filmbuff1991 I don’t know how to check hat out

[@3drhodes]

If your having this problem simply watch this video entirely. At 4:50 say these words “mishka mushka Mickey Mouse and I promise it will turn on. 😮

[@quentinhodges8728]

Good video/ good solution but it would help more if you get straight to the point.

[@specialspring]

Not helpful. My AC is brand new and I’ve been waiting an hour and nothing is happening.

[@blueivyari4918]

Still didn’t work I can see the number and see the light but it doesn’t turn on fan or ac

[@vernroach3413]

There is a furnace switch on the side of the furnace...It may have been turned off accidentally...Kids do that often...Looks like a light switch...Breaker may have tripped too...Thermostat probably has batteries...Thats why it is working...Try not to short cycle the AC u nit...Meaning off-on- off...Trips breakers, can burn units up.

[@deadshottontwitch4810]

I’m still confused lmao 🤣 so much explanations, just need the solution. What is the solution?

[@edwardvenegas4982]

spanking the chongo?