Cooling

[NYBruce]

Google nest  works well with heat all winter.  Now trying to set up a/c, theses are the wires from seperate a/c thermostat(yellow...green....red..) which terminals on the nest do they go to? Right now I show no cooling mode on the nest.(can I post picture?)

[Patrick_Caezza]

Do you have two separate systems for heating and cooling? If yes, are you trying to control both with one Nest thermostat?

Can you post a picture of the original thermostat's wiring?

[NYBruce]

yes sperate systems

[Patrick_Caezza]

If you are trying to control both systems with just one Nest thermostat then you need the Nest Learning Thermostat, 3rd Gen. The Google Nest Thermostat is not compatible with a dual transformer system which is what you will have.

[Ryan_G]

Hey NYBruce,

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 about the Nest Learning Thermostat. 

I hope that helps. 

Thanks for your assistance, Patrick_Caezza.

Best regards,

Ryan

[Ryan_G]

Hey NYBruce,

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 NYBruce,

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