Nest has stopped charging properly

[LanaB]

After less a year of having the 3rd Gen. Nest, it has decided not to charge properly.  The battery is 3.671 V, the Voc is 8.34 V, the Vin is 8.34 V and the lin is 20mA (a).  Any suggestions on why/what to do to correct this issue?

Thanks, Lana

[Patrick_Caezza]

Is there a C wire installed?

Some HVAC systems just don't like the way Nest keeps the internal battery charged and only a C wire will fix it.

• 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.

[Ryan_G]

Hi LanaB,

Thanks for reaching out here in the community.

I'd like to jump in here and check if you've seen Patrick_Caezza's response. Let us know if you have other questions by replying to this thread.

Thanks for your help, Patrick_Caezza.

Best regards,

Ryan

[MelbaDT]

Hey LanaB, 

Checking back in — how's it going? Still need our help with your thermostat? 

Best, 

Melba

[LanaB · Accepted solution]

I contacted the company that installed our HVAC system and they had failed to connect the C wire, I believe, but they came and connected it and our Nest works great! Thanks! Lana B

[MelbaDT]

Hey there, 

That's awesome and thanks for getting back to us. We're glad to hear that you now have a thermostat that is working as it should!. Feel free to let us know if you have further questions about this. 

Cheers, 

Melba

[MelbaDT]

Hi, 

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best, 

Melba