How To Tell If Nest Thermostat Battery Is Low. Once your battery level gets below 36V your Nest thermostat will disconnect from Wi-Fi. Im in a cold weather climate so I when went home to check on it.
Make sure that battery level is at 38 V or higher. Cut off power to the thermostat at the system switch the breaker box or the fuse box. About five minutes after getting to work this morning I noticed in my app that one of my two thermostats was offline.
The battery will drain slowly and require charging when you want to use the thermostat.
If there is a power issue and the backup batteries get low your thermostat lets you with a low battery message in the Home app and on the display. You may see a blinking green or red light at the top of the Nest. To check your battery level. Recently purchased Orbi WiFI 6 AX4200 had it for 2 days now and for the most part everyting seems to be working nicely except for NEST Thermostat Gen 3.
