Thermostat needs to Shut down to recharge battery

[neravens]

Hello,  Starting today my Nest Thermostat is not charging while connected to the hard wire.  I followed the instructions provided on Nest Support but still doesn't work.  What do I need to more to resolve this issue?

[CoolingWizard]

From what you write I believe that the thermostat was charging before and only recently stopped charging. Is that a correct assumption?

AC Cooling Wizard

[Dpike]

I have this same problem, it was working for a year, now it won’t hold charge. 

[CoolingWizard]

@Dpike , as long ad your system is providing power and the internal battery is no longer taking a charge, the thermostat will need to be replaced. Check your power on the Nest Thermostat display under SETTINGS.  What are the values being reported?

AC Cooling Wizard

[Dpike]

Battery 3.656V 

VOC: 33.72 V

VIN: 31.02 V

LIN: 200 mA (c)

[CoolingWizard]

@Dpike , based on those readings, the thermostat’s charging circuitry is working fine. Your battery is nearly fukk charge at 3.656V and charging current of 200 mA is the maximum. 

if the information I provided you was of help, please tap the 👍🏻 Kudo. If my answer solved your problem, please make sure you market it as a recommended answer.  

AC Cooling Wizard

[Patrick_Caezza]

@neravens and @Dpike 

Do either of you have a C wire installed?

[Dpike]

Yes, I do have a C wire.