On the thermostat go to settings technical info power. Connecting a nest thermostat to an incompatible system such as a millivolt proprietary or high voltage system wont deliver the power needed to charge your thermostats battery and can damage.
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Nest thermostat e not charging. The battery voltage should be the first number you see. I believe the threshold is 38v where it will drop wifi. If you witness green blinking light there are different reasons. Then it began to struggle with recharging had network dropouts disconnects and began to insert delay times apparently randomly and. Also there are chances that your nest thermostat battery wont charge so you have to look into this issue. Check on the nest itself under settingstechnical infopower.
If the nest thermostat isnt getting enough power from w or y and there is no common wire. Lets help you solve the issue with the battery because it is the most common issue that more substantial number of users face. Never try to restart the nest while its connected to a computer or power source while charging. You should now see the nest animation as it starts back up. Disconnect the nest from the usb cable and hold down the nest ring for about 10 seconds or until the display goes black. On some older acfurnace setups theres not enough voltage coming through the constant power wire to charge the battery on the nest.
My nest generation 1 had been working flawlessly for several months both summer and winter heating and cooling until about january 23rd 2013 or so. Fix nest thermostat battery issue. To preserve battery life the thermostat display. If the voltage is low there may be a. The nest appears only to charge when the ac system is running robbing a small amount to charge itself. Nest thermostat battery charging problem and solution.
If the voltage is above 36 youre good. It will deplete if the system is off for too long. Press the nest ring again to turn back on the device and release. The nest thermostat keeps its internal battery charged using your heating and cooling system wires but if theres a problem the battery may drain. While we find that in the vast majority of homes the nest thermostat can charge its built in battery by power sharing from the regular heating and cooling wires. Sometimes the software might be updating or the device is restarting.
You can go to the technical info page on the thermostat to see what kind of voltage its receiving and the battery voltage level as well. Therefore it is probably not an issue to troubleshoot.