topic Re: Nest not heating in Nest Thermostats

Nest not heating

slieblich — Mon, 22 Nov 2021 20:00:31 GMT

Unit worked fine for 2 years. Now glows orange but no signal being sent to furnace. 2 other zones on our same furnace with non nest thermostats work fine. I'm feeling its the firmware update as some others have mentioned but Google help won't acknowledge that is the issue. Anyone in Community able to help since Google won't acknowledge the problem?

Re: Nest not heating

laurentbourg — Mon, 22 Nov 2021 22:11:55 GMT

You first need to make sure that your thermostat is not defective. Turn off power to your furnace, then join together the Rh and W wires (take them out of the nest wire plate and join them with a small wire nut or just twist them together), power back your furnace and check if your zone is working properly.

Re: Nest not heating

slieblich — Tue, 23 Nov 2021 13:47:41 GMT

Good point; I re-installed the original non nest thermostat and it works fine

Re: Nest not heating

laurentbourg — Tue, 23 Nov 2021 14:13:20 GMT

Ok so this could be either a software or hardware issue, more likely a hardware issue. You could try to reset it and see if that resolves the issue. If not, I would call google support and discuss a potential replacement unit with them. Not sure which Nest model you have but in my experience 6.2-22 software version on the Nest learning third gen works fine and 1.1-9 on the Nest 2020 also does not seem to have any issues (the one with the mirrored backplate).

Re: Nest not heating

slieblich — Tue, 23 Nov 2021 14:48:25 GMT

Thanks. I've spent last 65 minutes with chat support. You and I seem to be the only ones thinking its a hardware issue. They keep putting me through same steps as already done with previous support calls (remove Rh and try, Remove C and try) etc. etc.

Re: Nest not heating

slieblich — Tue, 23 Nov 2021 14:49:12 GMT

it is the 6.2-22 software. If I do full reset does it go back to a previous software/firmware?

Re: Nest not heating

laurentbourg — Tue, 23 Nov 2021 14:51:37 GMT

You can’t revert easily to a previous firmware but try to reset it, you can do a full reset from the Nest device menu.

Re: Nest not heating

laurentbourg — Tue, 23 Nov 2021 14:54:46 GMT

Also before resetting it, try to restart it and see if that helps. Press down for 10 secs to restart.

Re: Nest not heating

slieblich — Tue, 23 Nov 2021 14:59:37 GMT

I did the restart as one of the first steps. Didn't work

Re: Nest not heating

laurentbourg — Tue, 23 Nov 2021 15:01:02 GMT

Ok. Suggest you do the reset, there could be some configs messing things up cross versions.

Re: Nest not heating

slieblich — Tue, 23 Nov 2021 15:02:08 GMT

Also another good suggestion on your part. Their support never mentioned that.

Re: Nest not heating

Elswann — Sat, 27 Nov 2021 12:49:35 GMT

Same situation. I have two nests...both stopped heating properly with 6.6-22. Old thermostats work perfectly, so it's not the system.

I've reset, rebooted, swapped locations....nothing. I have to fight with it to turn in and when it does come on its a short cycle and never teachers the temp.

Re: Nest not heating

laurentbourg — Sat, 27 Nov 2021 14:21:41 GMT

Hi Elswann, I assume you mean the 6.2-22 software? 6.6-22 is not available. If you tried to remove the Nest from your Nest app and do a factory reset so that it is a clean install as if it was new and that didn’t resolve the issue, try restarting your router to ensure it’s not some strange connectivity issue confusing the Nest.

Re: Nest not heating

Elswann — Thu, 09 Dec 2021 12:58:49 GMT

Correct 6.2-22

Re: Nest not heating

SanNGA — Mon, 13 Dec 2021 10:21:40 GMT

Hi there I have two devices as well running 6.2.22 and I am having the exact same issue with it not hearing correctly. Has this issue been resolved? We have tried to reset, restart, etc and nothing seems to fix it. Is there a way to revert to previous version?

Re: Nest not heating

Elswann — Sun, 19 Dec 2021 04:52:29 GMT

Not that I've found. Fortunately, where I am it's been hot-- I can tell you the AC works perfectly still. Had to turn it on today.

As long as the weather holds....I'll just wait out an update. If we turn cold soon-- I'll have to switch to another brand. Maybe even grab the cheap digital Amazon ones.

Re: Nest not heating

BM1 — Fri, 24 Dec 2021 08:01:42 GMT

Try turning off the safety temperature. Seems to have worked for a lot of people on this thread.

Google absolutely sucks for doing this and for refusing to acknowledge it is an issue.

https://www.reddit.com/r/Nest/comments/rkt0zm/why_is_my_nest_not_calling_for_heat_safety/

Re: Nest not heating

purplexsu — Fri, 28 Oct 2022 15:05:13 GMT

Turning off safety temperature indeed fixed my nest, thanks so much

Re: Nest not heating

Greg02134 — Thu, 10 Nov 2022 16:03:01 GMT

Got a new Nest Learning v. 3rd gen last summer. Earlier this week, it failed with the dreaded nest.com/W5 error - can't connect to WiFi, and no networks detected. Google swapped it out and sent me a new unit (no backplate, just the CPU). I installed it yesterday. Update firmware to 6-2-27. Everything checks out, tests were successful.

This morning, 5:00a.m., schedule calls for temp to go from 65°F to 70°F. Nest was orange, fan (air handler) was blowing cold air, but my Trane status LED's indicated that no heat was being called for.

I reset the Trane (powered off, then on), rebooted thermostat, and it heated normally.

Suggestions anyone? Very annoying, to say the least.

P.S. I've turned off the safety temps to see if this resolved the issue.

Re: Nest not heating

NotRobocop — Mon, 14 Nov 2022 15:37:29 GMT

Just wanted to add my 2 cents here -- having similar issue as Greg02134. Have an old Nest gen 1 thermostat that worked fine for years. When heat is turned on, the Nest and Nest App (also tried the Google Home app) all turn orange/indicate heat is on, but the status LED on our Rheem system just indicates fan-only and the furnace never gets switched on. Double/triple/quadruple checked wiring, etc., all looks good. Bypassing the thermostat by wiring red/white directly (after taking proper precautions, of course 😉 ), and the furnace fires up as expected.

Couple of important notes:

* As noted, it's a gen 1 Nest, I guess no longer being updated; last update Sep 24, 2019, v5.9.4-5 ... Not opposed to upgrading to a newer model at all, but would sure like to know if that'd fix my issue.

* We have a brand new Rheem system. This past spring, our 22-year old Carrier system bit the dust and we had it replaced. Did a ton of troubleshooting on the new Rheem this past weekend before realizing the issue wasn't with the system but appeared to be with the thermostat instead. Is there some kind of signal change newer furnaces look for to activate?