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White, green & 2 black wires -Help??

Omaneuf
Community Member

Our house was built in the 1960s.  The wires to my old thermostat are white, green & 2 black ones. Does anybody know how to wire this?

1 REPLY 1

David_K
Diamond Product Expert
Diamond Product Expert

Welcome to the Google Nest community! To help with this we would need to see a photo of the current wiring, that clearly shows the wire labels. The colours alone are not sufficient to advise.