No power wires detected Rh or Rc wires required.

[Jamesm1]

Nest says wires are not powered e72

voltmeter has 29 volts on the red wire.I have only one red. Put it in Rh and Rc but still not detection. 

comnected hp t6 pro and it works.  

thoughts 

[sporfrog]

The colors and the letters are closely related but not always and not absolute.  Do you happen to have a picture of your old thermostat wiring and the wiring how it is installed for the nest?  Which Nest Thermostat do you have?

Generally speaking if you have only one R, RH or RC wire you will connect it to either RH or RC on the Nest and the thermostat will provide an internal jumper if needed.  Do not install a jumper wire.  If you only have heating use RH if you only have cooling use RC and if you have both either.

[MelbaDT]

Hey folks, 

Appreciate your answers here, sporfrog. 

Jamesm1, I'm chiming in to ensure you've seen sporfrog's response above. If you still need our help, please reply back with the requested photo so we could take a closer look at your system. 

Best, 

Melba

[Ryan_G]

Hey folks,

I just wanted to follow up and see if you're still in need of help. Please let us know as we would be happy to answer any questions you may have. 

Best regards,

Ryan

[Ryan_G]

Hey there,

Thanks for being here in the Google Nest Community. 

I'd like to bump in here and make sure that you’ve seen our response.

Please let us know if you have any other questions or concerns as I will be locking this thread in 24 hours.

Have a great day.

Best regards,

Ryan