Voltage

[PD2]

My thermostat seemed ok but lost Wi-Fi for some reason. Says battery good on gray wires .After install no cOriginal wiring

[Patrick_Caezza · Accepted solution]

Nest Thermostat

Nest thermostats are designed to work without a common ("C") wire in most homes. During installation, a small number of customers may find that the Nest Thermostat does not receive sufficient power. The Nest Power Connector or a C wire may be necessary. See g.co/nest/cwire for details.

One indication that you need the C wire is when the Nest thermostat won't work on wifi. What it does is shut down the wifi circuit to conserve power.

[MelbaDT]

Hey folks, 

Thanks for responding, Patrick_Caezza. 

PD2, glad to hear that you've got the answer you're looking for. Feel free to let us know if you have more questions in mind. 

Best, 

Melba

[Ryan_G]

Hey PD2,

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