How to install 7 wire old thermostat to Nest 6 pin

[JH123]

 

 

[sporfrog]

Technically speaking, assuming all the wires in the photo have a function and are connected at the HVAC end, the "Nest Thermostat" is not compatible with your system. You might be able to just not use one wire and therefore not have a function like emergency or auxiliary heat. That's not ideal and not recommended.

You can check at the HVAC unit where the thermostat wire ultimately goes just to be sure each of the colored wires is connected to a terminal.

It appears you have a Heat Pump, but the thermostat also supports "conventional" like a gas furnace. Do you know which you have?

[Markjosephp]

Hello folks,

I wanted to stop by and see how I could help.

Thanks for helping here on this thread, @sporfrog.

@JH123, It appears that your system would only be compatible with the Nest Learning Thermostat, which has a specific terminal for emergency heat. You can also check your system’s compatibility with our online Compatibility Checker.

Please let us know if you have any other questions or concerns.

Best regards,

Mark

[EmersonB]

Hi everyone,

@JH123 I'm dropping by to ensure that everything is covered here. Were you able to check the link shared above? Let us know if you have more questions in mind.

I appreciate the help, Mark and sporfrog.

Regards,
Emerson

[Markjosephp]

Hi JH123,

I'm checking in to make sure that you've seen our response. If you have any further questions or concerns, please let us know before we lock this thread in 24 hours.

Thanks,

Mark