topic Re: Issues with Nest Thermostats (Mirror Face) - One Dead, Low Voltage on other in Nest Thermostats

Issues with Nest Thermostats (Mirror Face) - One Dead, Low Voltage on other

BLeClair12 — Thu, 21 Jul 2022 04:16:54 GMT

I have two Google Nest Thermostats that I installed about a month ago when we purchased our home. We only had red and white thermostat wires available, so I installed two power connectors at the zone control board. Both units were functioning perfectly until today.

I received a Home app notification saying my upstairs unit was offline. I went to check on it and it was extremely hot to the touch. I took it off the wall and removed the batteries. After it had cooled down, I put them back in and reattached it. Nothing happened. I tried two new, fresh 1.5v AAA batteries. Nothing. I swapped the batteries from the working Nest into the dead one. Still nothing. Google support said the unit was faulty and set up a replacement.

I was able to check its last stats and saw a voltage of 3.03. I was under the impression that it was supposed to be 3.6-3.7 to function, but I never saw any connectivity issues prior to this. Out of curiosity, I checked the downstairs unit and found it, too, is operating at around 3.08v. The unit detects the power connector and throws no errors.

I’ve since combed over the support doc from Google and am wondering if the 3.6-3.7 voltage applies only to the learning and E models and not the AAA battery powered Nest. It specifically makes note of internal rechargeable batteries when discussing voltage.

Is it likely that I just had a faulty unit and everything is okay otherwise, or are the numbers on the functioning unit cause for concern?

Battery Status: Good

Voltage: 3.085v

Impedance: 696mOhm

Connected to: W(P)-R

VIN: 34.13V

lin: 385(W)

PS: W-385, WP-18

Power Connector Detected

Re: Issues with Nest Thermostats (Mirror Face) - One Dead, Low Voltage on other

Ryan_G — Thu, 18 Aug 2022 13:21:50 GMT

Hi BLeClair12,

Thanks for reaching out here in the Google Nest Community.

We appreciate all the details you've included in your post. I'd like to verify if you're using a Nest Power Connector or you have a C (common) wire already connected?

Regards,

Ryan

Re: Issues with Nest Thermostats (Mirror Face) - One Dead, Low Voltage on other

Ryan_G — Mon, 22 Aug 2022 03:24:40 GMT

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

Re: Issues with Nest Thermostats (Mirror Face) - One Dead, Low Voltage on other

Ryan_G — Tue, 23 Aug 2022 03:27:57 GMT

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