topic Re: Nest firing air conditioner in heat mode in Nest Thermostats

Nest firing air conditioner in heat mode

nimishsn — Mon, 25 Apr 2022 00:53:24 GMT

Just installed the Nest thermostat. On testing heater mode, it is starts the air conditioner.

On cool mode as well, it starts the air conditioner, which is fine.

Please help.

Re: Nest firing air conditioner in heat mode

nimishsn — Mon, 25 Apr 2022 00:54:06 GMT

@members

Re: Nest firing air conditioner in heat mode

Patrick_Caezza — Mon, 25 Apr 2022 01:21:04 GMT

Post a picture of the original thermostat's wiring here

Re: Nest firing air conditioner in heat mode

nimishsn — Mon, 25 Apr 2022 01:49:40 GMT

Original

Nest

Re: Nest firing air conditioner in heat mode

Patrick_Caezza — Mon, 25 Apr 2022 03:11:01 GMT

You have it wired the way I would wire it.

Try doing a factory reset on the thermostat and set it up again from scratch making sure to select only the W/W1, Y/Y1, G/G1, and R wires.

Nest thermostats are designed to work without a common ("C") wire in most homes. During installation, a small number of customers may find that the Nest Thermostat does not receive sufficient power. The Nest Power Connector or a C wire may be necessary. See g.co/nest/cwire for details.

Re: Nest firing air conditioner in heat mode

nimishsn — Mon, 25 Apr 2022 17:10:19 GMT

Factory reset and selecting the wire configs you mentioned worked, probably I selected an incorrect wire setting.

Thanks a lot for your help!

Re: Nest firing air conditioner in heat mode

CDalton — Mon, 25 Apr 2022 21:15:55 GMT

I just had the same issue, but I also have a blue wire which is in the "

B" connection in my original thermostat. We tried it as the C wire and as the B wire with a factory reset each time we tried again. Never worked, so we put the old thermostat back to have a bit of heat for the night as we could only get it to blow cold air. Any additional suggestions? Maybe it isn't compatible? Here is the original wiring.

Re: Nest firing air conditioner in heat mode

Patrick_Caezza — Mon, 25 Apr 2022 23:30:29 GMT

Start your own thread and don't hijack someone else's as it will get missed. You are lucky I saw this.

Re: Nest firing air conditioner in heat mode

CDalton — Mon, 25 Apr 2022 23:36:13 GMT

I'm so sorry. I didn't realize asking a follow up question would be considered "hijacking" another question. I was just trying to figure out if I could et an answer to a similar question.

Re: Nest firing air conditioner in heat mode

MelbaDT — Wed, 04 May 2022 03:30:56 GMT

Hey folks,

Thanks again for your answer, Patrick_Caezza.

nimishsn, glad to hear that you've managed to have it working as it should with the help of Patrick's suggestions. Feel free to reach out again should you have more questions.

CDalton, no worries — no harm done. Also, we've replied to your own thread. Let's continue there.

Best,

Melba

Re: Nest firing air conditioner in heat mode

MelbaDT — Fri, 13 May 2022 07:16:45 GMT

Hi,

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best,

Melba