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Is my system compatible?

Community Member


I recently ordered a Google Nest
Thermostat - Sand for my ac system. I installed but at no point did it cycle the compressor so I rolled back to my Honeywell. In total I have 6 wires (unused wire labeled C behind the plate) and a heat pump without any sort of dual stage. It's entirely possible that I was impatient with the 5 minute cycle delay as I tried switching o/b setting as soon as I turned the system on. Picture below


 thanks in advance!


Community Specialist
Community Specialist

Hello Danimalrex,

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

Your Heat Pump system with its existing wiring setup is Nest-compatible. With the spare wire, have you tried connecting it to the C terminal? If you haven't yet, try installing it and gathering the power readouts in the Technical Info settings or in the Equipment settings with and without the Common wire. This is to see if the power changes and if it needs one to provide additional power.

Keep me posted.


Hey there,


I wanted to see if you still needed help. Please let us know if you have any other questions or concerns.



Hi Danimalrex,


I'm checking in to make sure that you've seen my response. Please let us know if you have any additional questions or concerns before we close this thread in 24 hours. 


Best regards,