The Nest thermostat is fueled by the energy from your HVAC wiring and keeps its internal battery charged. The battery drains steadily over time, even while it is not in use. It will become unusable if the battery level falls below the minimum operational level. On the back of each Nest thermostat is a USB charging connector that may be used to manually charge the battery. Troubleshooting in general, and specifically troubleshooting the wiring between the HVAC and Nest depends on a variety of circumstances.The Nest thermostat's internal rechargeable battery is represented by Battery Level. It ranges between 3.6 and 3.8 [...]

Nest Support has published an instructional on what to do if your Nest Thermostat won't turn on. The company recommends recharging and restarting your thermostat to fix the problem. If you can't control it or it's acting sluggish, try manually restarting it. If you own a Nest Thermostat, you've definitely heard about the recent problems and are worried about losing heat in the midst of winter. But have no fear! "What to do if your Nest Thermostat has become slow, unresponsive, or won't switch on" is the title of an instructional page produced by Nest Support. That is, in fact, [...]