upgrading nest 2nd gen thermostat to newest generation. can you use old base ?

[slrossetti]

can you attach new gen thermostat to older gen (2) base ?

[Frustratedddd]

Sadly not

[NXR]

No, but it's an easy swap. I did mine today. I also kept the 2nd Generation rectangular trim plate by busting the four little "tabs" off so the 4th gen base sits flat. It looks good.