Help on thermostat compatibility!

[YuchenXie]

Requesting help, I am very interested in purchasing a Nest Thermostat, but I am not sure if it is compatible with my home. It now has seven wires already connected and they are R , W/Y, Y/A, GI, Gm, GH, and C. 

[Patrick_Caezza · Accepted solution]

You are compatible with the Nest Learning Thermostat, 3rd Gen

Try this wiring

Blue - R to Rc

Orange - W/Y to W1

Yellow - Y/A to Y1

Red - Gl to G

Green - Gm to Y2 (set as 2nd-speed fan relay)

Black - Gh - to * (set as 3rd-speed fan relay)

White - C to C

[Patrick_Caezza]

Yes, your system is compatible with the Nest Learning THermostat, 3rd Gen.

I can't see the colors of the wires at each terminal. Can you post a picture showing them?

[YuchenXie]

Thank you very much for your reply sir! As shown in the picture Blue-R, Orange-W/Y, Yellow-Y/A, Red-GI, Green-Gm, Black-Gh, White-C.

 

[YuchenXie]

 

[Patrick_Caezza · Accepted solution]

You are compatible with the Nest Learning Thermostat, 3rd Gen

Try this wiring

Blue - R to Rc

Orange - W/Y to W1

Yellow - Y/A to Y1

Red - Gl to G

Green - Gm to Y2 (set as 2nd-speed fan relay)

Black - Gh - to * (set as 3rd-speed fan relay)

White - C to C

[Ryan_G]

Hi YuchenXie,

Thanks for reaching out here in the community.

I'd like to jump in here and check if you've seen Patrick_Caezza's response. We'll be glad to assist you further if you have any other questions.

Thanks for always helping us, Patrick_Caezza.

Best regards,

Ryan

[Ryan_G]

Hey YuchenXie,

I just wanted to follow up and see if you're still in need of help. Please let us know as we would be happy to answer any questions you may have. 

Best regards,

Ryan

[Ryan_G]

Hey there,

Thanks for being here in the Google Nest Community. 

I'd like to bump in here and 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 thread in 24 hours.

Have a great day.

Best regards,

Ryan

[Ryan_G]

Hey there,

I just wanted to follow up and see if you're still in need of help. Please let us know as we would be happy to answer any questions you may have. 

Best regards,

Ryan

[MelbaDT · Accepted solution]

Hi, 

We haven't heard from you in a while so we'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