3rd Gen Nest Thermostat No Longer Charging even using USB

[Seren63]

This really isn't a Wifi or Connectivity Issue except that it won't connect to the Wifi because it will no longer hold a charge.

• This is the second dud 3rd Gen Nest thermostat I have purchased. 
• I have owned this thermostat for about a year.
• It has worked for a year with no problems.
• It went "offline" because of a low battery.
• Now it won't charge even on the USB.
• I have a "C" wire and it is properly connected. If it were not, it wouldn't have worked for a year. All the voltages are correct for the wires.
• Nothing about the A/C unit or electrical wiring has changed.

I'm open to suggestions, but please do not tell me to charge it on the USB and replace it. I've tried that. It doesn't work. Thank you for any input you can provide.

[Seren63]

• Oh, and I found that I purchased this thermostat on 17 September 2023.
• I just let it stay charging on the USB for more than 2 hours. The thermostat was blinking green when I removed it from the USB cable. The thermostat was very hot to touch.
• As soon as I unplugged it, the screen asked to be attached to the base. On my way to do so, the light started flashing red and the screen said the thermostat needed to shut down.

[AxelD]

Hi Seren63,

Thanks for posting in the Community! I'm sorry to hear that your Nest Learning Thermostat 3rd Gen is no longer holding the charge and not connecting to the WiFi. I appreciate all the troubleshooting steps you've already tried; they are the correct ones. Since the issue persists, please fill out this form. An agent will contact you as soon as possible with further instructions. Remember to add the thread conversation link to your request.
 

Let me know once you've submitted your form.
 

Regards, 
Axel.
 

[jdmd77]

I have had exactly the same issue! Same scenario.  I will fill out the form sent to Seren63

[AxelD]

Hi @jdmd77,
 

Thanks for reaching out to the Community! I'm sorry to hear that your Nest Thermostat isn't holding a charge.
 

Before submitting the form, could you please try charging your thermostat with the USB cable? If you've already done this and the issue persists, feel free to fill out the form.

Best regards,

Axel.