topic Re: Nest thermostat wiring in Nest Thermostats

Nest thermostat wiring

beaverstaylor — Fri, 16 Dec 2022 20:20:55 GMT

Hello, I’m searching for help wiring up my new nest thermostat. It seems that I have 7 wires coming off my old Honeywell thermostat but only have 6 terminals on the nest. Currently I have no place to put the (E) , (O), and (Aux) wires. So is my new nest even compatible? And if so. Is there a diagram you can provide for my specific wiring?

Re: Nest thermostat wiring

Houptee — Fri, 16 Dec 2022 21:02:47 GMT

Looks like you have a Heat Pump system with Aux heat and Emergency heat.

You cannot have both Aux heat and Emergency heat with the regular Nest but it will still work with your system.

Connect R to R

C to C

G to G

Y to Y

O to O/B

Aux to W

E do not connect tape it off.

During setup tell Nest its a Heat Pump forced air system with Auxiliary Heat (on W).

Re: Nest thermostat wiring

CoolingWizard — Sat, 17 Dec 2022 06:09:56 GMT

Does your HVAC system have a Humidifier? Sometimes those thermostats can be option setup so that AUX is used for humidifier control.

Ken, The AC Cooling Wizard

Re: Nest thermostat wiring

beaverstaylor — Sat, 17 Dec 2022 13:36:36 GMT

This method seems to be working. Thank you!!

Re: Nest thermostat wiring

beaverstaylor — Sat, 17 Dec 2022 13:37:22 GMT

I don’t believe so. But the previous method seems to have it working. Thanks!

Re: Nest thermostat wiring

EdwardT — Wed, 21 Dec 2022 00:24:38 GMT

Hi folks,

@CoolingWizard and Houptee, thanks for the help!

@beaverstaylor, thanks for posting. I'm glad to hear that it's working fine now. Please observe it for now and let us know if anything comes up.

Thanks,

Edward

Re: Nest thermostat wiring

EdwardT — Mon, 26 Dec 2022 23:55:10 GMT

Hey beaverstaylor,

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do.

Thanks,

Edward

Re: Nest thermostat wiring

EdwardT — Wed, 28 Dec 2022 03:39:10 GMT

Hi beaverstaylor,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward