Showing results for 
Search instead for 
Did you mean: 

Nest thermostat requirements

Community Member

I have a Nest Learning Thermostat in the downstairs zone and it installed easily and is working fine. I just bought a second standard Nest Thermostat for the upstairs bedroom. The wiring is the same in both locations, just an R and a W wire. Unfortunately the installer app is telling me I need some type of C wire adaptor for the upstairs standard Nest Thermostat. Is this correct? Should I just buy another Learning Thermostat?


Community Specialist
Community Specialist

Hello ggirol,

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

It appears that you have the Nest Thermostat (2020) model, which often requires a C wire to work. If you have a zoned system with more than one thermostat, install the power connector at the zone controller to avoid power issues.

Feel free to let us know if you have more questions.

Best regards,


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.


Community Specialist
Community Specialist

Hi ggirol,


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.