nest wiring setup

[Nohman67]

hello, i have a old trane mercury thermostat that i want to upgrade to the nest. I have a heat pump and the labels for the wires arent matching up to the nest. Would the nest be compatible and  if so which wires would go to what new labels. Thanks for the help.nestold tstatold tstat wiring

[Houptee]

Looks like a Heat Pump.

What kind of heat do you have with this system?

Is it gas heat or electric coils aux heat?

[Nohman67]

Electric heat

[Jhonleanmel]

Hi folks,

Thanks for the help, Houptee.
Nohman67, your wire label indicates an incompatible system.

These systems usually only work with thermostats made by the same manufacturer. But some incompatible systems may also have the option to use standard heating system wires. Contact a local pro and have them check if your system can be rewired to be Nest compatible.

Best,
Mel

[Jake]

Hey there,

I wanted to check in and see if you managed to see Mel's post. Please let me know if you have any questions from here. I would be happy to assist, and make sure you are good to go.

Best regards,
Jake

[Jake]

Hey there,

I wanted to check in, and let you know that I will be locking the thread in 24 hours.

Best regards,

Jake