The nest appears only to charge when the ac system is running robbing a small amount to charge itself. The charge level is listed in the battery area and should be 36 volts or higher.
Nest Thermostat No Wifi Or Low Battery Issues Solved
Nest thermostat battery won t charge. If the voltage is above 36 youre good. Comments off on nest thermostat battery charging problem and solution nest thermostat battery charging problem and solution 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. The battery voltage should be the first number you see. We are aware of a low battery issue impacting some nest thermostat owners. You can contact them here. It will deplete if the system is off for too long.
Do not try to restart your thermostat while its still connected to a computer for charging. On the thermostat go to settings technical info power. You can monitor the battery charge status by heading to settings technical info and scrolling the nest to to power. Red is rc or a the other take blue wire connect it to the other wire on low voltage side of transformer now you have common. If the nest falls below this number it will shut back off. Not sure if the root cause is a battery issue or software update issue since it worked fine for months before.
If the nest battery continues to drain itself you will have to contact the nest technical support department for further assistance. Hook that up to the c terminal on your nest. When you have connected the nest thermostat to the system it should switch on. If the voltage is low there may be a. The thermostats might turn off without your consent if you dont use it for some time but then it might turn on once it is accessed through the nest thermostat app. If you witness the red light blinking you should wait until the battery is 100 charged.
Nest has admitted that people are having problems with its batteries. In the mean time red goes to rc from the transformer 2 wires one maybe red and the other blue or yellow maybe white. In some cases this may cause the device to respond. They didnt go into detail why but if nest says dont do it do not do it. Check on the nest itself under settingstechnical infopower. If your nest thermostat is off and wont turn on take the thermostat off the base and charge it using a usb cord plugged into a wall charger or a computer.