Nest thermostat (wired) constantly restarting saying no battery power

[TheresaH]

We have had to manually work both power and water for 2 weeks. The thermostat is wired and says battery is low and then restarts. Happens in a loop. I’ve moved the device/ un installed and reinstalled and nothing is working. Is the device faulty?? 

[TheresaH]

As soon as it restarts, tells me time and date are wrong then says batttery low restarting will be back in a bit…it is plugged in! 

[moralesvicente]

Hello TheresaH

Thank you for posting in this community, To best assist you based on the information you've shared, please follow these instructions:

Charge your thermostat with a USB cable

Pull off the thermostat display and use the USB port on the back to charge it with a USB cable and wall charger. 

Note: Do not use a computer USB port or other unpowered USB port for charging, connect it directly from an outlet.

The display should eventually light up with a message asking you to connect it to the base. try to charge up the device for about 2 hours and ensure that the thermostat is receiving enough power then Reconnect the display to the thermostat base. Press firmly until you hear it click into place. 

Regards,

Daniel