I have a Geothermal system with two thermostats! One is for hot water on floor! The other is force

[JackLip]

The second thermostat is for forced air cooling and emergency heat!

I want to connect the Nest to the forced air / emergency heat side?

Has anybody any experience here that could advise??

Jaclip

[Markjosephp]

Hello JackLip,

Thanks for reaching out to the Google Nest Community Forum. I'd be happy to take a look at this for you.

Please share with us a picture of your thermostat's wiring. Could you tell us more about your geothermal system? Is this in-floor radiant heating? Also, from what country are you posting?

I'll look forward to your response.

Regards,
Mark

[Markjosephp]

Hey there,

I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Mark