No power to nest thermostat.

[GBW]

Just installed a new nest thermostat E and it has no power.  It is wired correctly.  Trying to charge now but getting nothing.  Any ideas?

[jge1]

I've got a similar problem.   Just got a Nest Thermostat E, and I connected the R and C terminals to a 24vac source (a wall wart), so that I can have a look at the various settings.    It keeps telling me that I do not have an 'R' wire connected.   Is it confused because I do not have anything at all connected to the other terminals at present ?

[MelbaDT]

Hey folks, 

Sorry for the delay but thanks for reaching out to the Google Nest Community. 

Could you both share a clear photo of your original thermostat wires showing the terminal labels as well as your current Nest Thermostat E's wiring? Also, what type of system do you both have?

Best, 

Melba

[jge1]

I actually started another thread with this question:

https://www.googlenestcommunity.com/t5/Nest-Thermostats/can-I-test-thermostat-with-only-C-and-R-wire...

... but then solved it myself.   The problem is that the 24vac wall wart, that I was using to bench test it, had stranded wires.   Evidently they don't make contact properly.

[MelbaDT]

Hey jge1, 

Thanks for getting back to us and for sharing what you've done. Let us know if you have any further questions in mind

Best, 

Melba

[Ryan_G]

Hey everyone,

I'd like to jump in here and check if you've seen Melba's response. Let us know if you need more help by replying to this thread.

Thank you for your help, Melba.

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