Offline thermostat sensor

[Ebronwk]

I see a lot of people have this problem. I have 3 nest thermostat sensors, and two thermostats, 1 upstairs and one downstairs, two of my sensors connected to one of the thermostats went offline and wouldn’t connect anymore. I unplugged the thermostat from its base, and charged it with a usb plugged, now the sensors are back online. Note: my thermostat receives hardwired power, the built in battery according to the phone read out receives enough power, yet the thermostat is saying battery is low, so I still had to charge the thermostat 3rd Generation. Can anyone tell me why. My downstairs thermostat never had this issue, “knock on wood”. Thank God. I really like the thermostat but this issue is annoying. Also the usb charge also help with the thermostat turning on upon approach.

[Jhonleanmel]

Hi Ebronwk,

Thank you for your posting.

Give these steps a whirl:

1. Ensure that the wires are connected properly
2. Remove the thermostat display from its base and check if any connector pins are bent.
3. If the issue persists, contact a pro installer to discuss your options.

Keep us posted.

Best,
Mel

[Jhonleanmel]

Hey there,

Checking back in should you still have some questions here. Let us know by replying to this thread.

Best,
Mel

[Ebronwk]

Is it suggested to replace the battery in the 3rd generation nest thermostat every 3 years and if not, what is the duration of the life of the battery?

[Markjosephp]

Hello folks,

I'm sorry for the late reply. I know it has been a while, but I wanted to ensure that everything was covered here.

@Ebronwk, the Nest Learning Thermostats and the Nest Thermostat E's batteries are built-in, and we don't suggest replacing them as it might damage their hardware and possibly lose their function. We'd suggest installing a Nest Power Connector or a C-wire to help the thermostats sustain and have sufficient power. If there’s anything else I can help you with, please let me know.

Thanks for helping, Mel.

Regards,

Mark

[Markjosephp]

Hi Ebronwk,

I wanted to see if you still needed help. Please let us know if you have any other questions or concerns.

Thanks,

Mark

[EmersonB]

Hi everyone,

@Ebronwk just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let us know.

I appreciate the help, Mel and Mark.

Best,
Emerson

[Ebronwk]

Thank you for your help, what I noticed is if I keep the thermostats operating, they are staying charged, I only use them in the winter so I expect in the spring and summer, the batteries will drain because the thermostats won’t be in use, I didn’t have that issue when I first bought them, but that was 3 years ago. I did charge them using the usb connector in back of the thermostat, but I know eventually the battery will die. I wish the battery replacement was like the nest carbon/smoke detectors, lithium AA, easier to replace, but I’ll know better next time. 

[Jenelyn_O]

Hi there,

@Ebronwk, I saw your post and wanted to chime in. It looks like you've come to a solution, so I'm going to lock this thread in 24 hours. If you have any other concerns or questions, please feel free to create a new thread.

Thanks for assisting this thread @mel, @mark and @Emerson. 

Best,

Jenelyn