topic Nest Thermostat compatibility check in Nest Thermostats

Nest Thermostat compatibility check

flaghi — Mon, 05 Dec 2022 02:30:33 GMT

I would like to confirm the compatibility of the Nest thermostat to my home system. Also regarding the dual fuel requirements. Thanks

Re: Nest Thermostat compatibility check

CoolingWizard — Mon, 05 Dec 2022 02:51:13 GMT

Flaghi,

Your HVAC system is a Heat Pump with Auxiliary Heating. This system is compatible with the Nest Thermostat. And, there is a little good news. You have an unused blue wire that can be used for a Power Common. Your HVAC system wires in use are:

Red wire on R terminal, this is Power IN

Yellow Wire on Y, This is Compressor control

Orange wire on O/B, This controls the heat pump Reversing Valve and switch the compressor between Heating and Cooling modes and Vice versa.
Green wire on G, this is the Blower Fan. (Auto/ON).
White wire on AUX, This is auxiliary heat, most likely electric emergency heat strips in the air handler.
Blue Wire, Not currently connected.

Do you have access to a multimeter some times called a Volt Ohm Meter?

Ken, The AC Cooling Wizard

If you find my answer helpful, please click the KUDO 👍, If my response answers your question, the click that Recommend this Answer.

Re: Nest Thermostat compatibility check

flaghi — Mon, 05 Dec 2022 04:11:14 GMT

Thanks Ken. Last question, do I need to add a C wire adapter? Is it needed?

Re: Nest Thermostat compatibility check

CoolingWizard — Mon, 05 Dec 2022 04:15:40 GMT

Not likely. The taped up blue wire can be commissioned as the common wire. It might already be hooked up in the air handler.

Ken, The AC Cooling Wizard

Re: Nest Thermostat compatibility check

Jeran — Wed, 07 Dec 2022 21:46:45 GMT

Thank you for helping out on this thread, CoolingWizard!

Hey there flaghi,

I'm just checking up on this thread, do you have any more questions or need any additional help?

Best regards,
Jeran

Re: Nest Thermostat compatibility check

Jhonleanmel — Tue, 13 Dec 2022 21:12:38 GMT

Hi folks,

Chiming in to see if you still need assistance with this. Let us know if you have additional questions ― we'd love to help.

Best,
Mel

Re: Nest Thermostat compatibility check

Jhonleanmel — Wed, 14 Dec 2022 21:15:56 GMT

Hi everyone,

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

Thanks,
Mel