topic Re: Nest Thermostat Won't Turn On Heat in Nest Thermostats

Nest Thermostat Won't Turn On Heat

disappointed — Sat, 30 Oct 2021 18:43:12 GMT

Thermostat has been working well until today. Now the heat won't come on. Did a reset, that did not help.

When I adjust the temperature a green leaf shows up and says in 1.5 hours, then says until 21:00. It's -4C outside, by 21:00H my pipes will be frozen. Support web site says they are open but all channels of communication are greyed out and unavailable.

Can anyone help?

Re: Nest Thermostat Won't Turn On Heat

disappointed — Sat, 30 Oct 2021 18:45:47 GMT

I don't have a Nest app on my phone and don't want one. Nest came thermostat came with the house. Nest web won't work unless I allow third-party tracking cookies, I'd rather rip the Nest off the wall.

Re: Nest Thermostat Won't Turn On Heat

Hug3kids — Sat, 30 Oct 2021 19:55:25 GMT

For the moment to prevent your pipes from freezing, you should be able to jump the Rh and the W wire which should turn on your heat. Keep in mind that it will not turn off until you take the jumper off !

I have the exact problem and support has been no help. Nothing has changed in my environment. They indicate it must be a wiring problem on my side. I explained that if I can jumper the wires and the system comes on that the system is working as designed.

Re: Nest Thermostat Won't Turn On Heat

CristianC — Thu, 04 Nov 2021 15:21:03 GMT

Hi @disappointed,

Thanks for reaching out. I'll do my best to get this resolved. Do you hear a click sound coming from the Heat Link? You should hear the sound each time you turn on/off your heating.

Re: Nest Thermostat Won't Turn On Heat

Hug3kids — Sat, 06 Nov 2021 00:44:30 GMT

Cristian - do you know if there is a way to roll back the firmware to a previous version ?

I find it concerning that there are so many people complaining of a similar issue that all began Sept/Oct time frame on systems that had previously been connected and working. I get it if anything changed, or for a new installation that you can't get to work. However all of the complaints that I have heard are for existing systems.

I just ordered another brand thermostat and will be interested to see if it works with no changes to the wiring.

Re: Nest Thermostat Won't Turn On Heat

CristianC — Mon, 08 Nov 2021 15:21:09 GMT

Hi @Hug3kids,

You can't revert the firmware on the thermostat. You can reset it to factory settings, but it will update automatically during the setup. No worries, software updates shouldn't affect the thermostat.

Re: Nest Thermostat Won't Turn On Heat

disappointed — Wed, 10 Nov 2021 19:00:14 GMT

We resolved this problem by pulling off the Nest facelate and plugging it into a USB charger. About an hour later we put it back on the wall and it recommenced communicating with the furnace.

Re: Nest Thermostat Won't Turn On Heat

Needhelp — Sat, 13 Nov 2021 22:35:46 GMT

Did this work we tried it worked for a night then didn’t work again??

Re: Nest Thermostat Won't Turn On Heat

Needhelp — Sat, 13 Nov 2021 22:37:44 GMT

Ours is has done the same thing

Re: Nest Thermostat Won't Turn On Heat

disappointed — Tue, 16 Nov 2021 16:23:55 GMT

Mine is still working.

Re: Nest Thermostat Won't Turn On Heat

GT_Settle — Fri, 19 Nov 2021 21:33:15 GMT

Here for same reason

Re: Nest Thermostat Won't Turn On Heat

GT_Settle — Fri, 19 Nov 2021 21:54:56 GMT

Had to do factory reset, and then reinstall as if all brand new. Here’s hoping it holds….seems to me like this is a software issue…..

Re: Nest Thermostat Won't Turn On Heat

Revil — Thu, 25 Nov 2021 08:29:08 GMT

My heat quit working. Seems like it happens when the outside temp reaches auxiliary temperatures. I go to equipment and run a test in my heat pump and it starts working. However, a day or so later heat doesn’t work again.

Re: Nest Thermostat Won't Turn On Heat

Pzhere — Sat, 27 Nov 2021 19:15:56 GMT

I too am one of the many unhappy customers of nest. Doesn't turn on. I have 1 furnace and 2 nests in house I bought 2 yrs ago. Starting today one of nest stopped

Re: Nest Thermostat Won't Turn On Heat

swEng11 — Sun, 28 Nov 2021 15:01:54 GMT

Having the same problem where only cold air is coming out of the register even though heat is displayed on the Nest thermostat. This is the 2nd time this happened; I called/chat with Google last month. What they had me do is reset the schedule. I just tried now and it did not work. The last month episode, I replaced Nest with the original thermostat and Nest was off power for almost a day so it ran out of battery power and it shutdown...right now waiting for someone to respond in the chat...Obviously there's a software screw up here evident that a lot of customers are experiencing this same problem...when I put back the original thermostat (Trane) the heat turns on so it's obviously the Nest thermostat and its software is the problem here...

Re: Nest Thermostat Won't Turn On Heat

swEng11 — Sun, 28 Nov 2021 16:05:33 GMT

Update: they had me remove the Y1/cool wiring and that did work and getting hot air now...problem according to them is the Base unit need replacing...$50 coz warrantee expired. I'm looking at similar thermostat with same if not better functionality...anybody tried ecobee or the Honewell smart thermo?

Re: Nest Thermostat Won't Turn On Heat

EMM — Sun, 05 Dec 2021 12:36:58 GMT

I’m here for the same issue. After 3 years of working fine, my Nest thermostat settings stopped turning on the furnace … although the safety temp feature still works, but I can’t adjust the safety temp to more than 45 degrees F. I’ve had the furnace repair guy out. He confirmed furnace is working fine. He detached the Nest wires and reattached them and problem was solved …. until now. It’s doing the same thing again.

Re: Nest Thermostat Won't Turn On Heat

Fnoton — Sun, 05 Dec 2021 16:11:43 GMT

I am having same issue with my nest thermostat. cooling is working fine, but heating is not. it's like the nest thermostat has a mind of it's own. will work whenever it feel like, but just not my time frame when I need to turn it on. I spent the last 3 years, days and hours with nest technical support, even got a new unit (base and face) replacement. Nest Thermostatic was working constantly at the end of last winter season, and now I am having the same issue. turning to heat mode. The device is indicating in heat mode, but no hot air coming out. if I tried at different time of the day. this nest thermostat might working again, but not in my time frame. I am very disappointed with this device. luckily I am in southern CA. even without heat in winter is not going to be life matter. I do see this a common issue on the forum. but there no clear answer how to fix it. I will be contact technical support once again.

Re: Nest Thermostat Won't Turn On Heat

Hug3kids — Wed, 08 Dec 2021 00:29:21 GMT

They replaced my base unit after telling me the same thing. Did not solve my problem.

Futhermore, after returning the old one (which was still under warranty), they still charged my credit card and had to put a dispute it to get that refunded.

I have multiple of the same thermostat and they all had the same update put on them at the same time which broke them all.

Re: Nest Thermostat Won't Turn On Heat

Hug3kids — Wed, 08 Dec 2021 00:30:04 GMT

I went out and purchased a smart wifi Honeywell thermostat. Same wiring, no changes and my system works fine.

Google/Nest support is the worst as they apparently are not knowledgeable enough on their own products.

In addition, simple trouble shooting skills is all that was need to prove this issue to them, but they wouldn't listen and eventually hung up.

I wasn't nasty, I was polite and just explained how technology works.

The fact that many people have been complaining of the exact issue beginning this heating season that seemed to correspond to a firmware update should have been evidence enough for them to address the problem.

I'm pretty frustrated with them and the almost $1000 in Nest Thermostats that are currently useless of mine.

I have 3 along with 6 wireless remote temperature sensors.

Rob