Do not try to restart your thermostat while its still connected to a computer for charging. 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.
Google Nest Support On Twitter If Your Nest Thermostat Has
Nest thermostat not charging on base. If there is a common wire installed the nest thermostat will not power share. If the nest thermostat isnt charging after power has been restored to your home check your breaker box to see that all switches are in the on position. Then it began to struggle with recharging had network dropouts disconnects and began to insert delay times apparently randomly and. Reconnect the display to the thermostat base. If the blinking red light doesnt go away or keeps coming back. They didnt go into detail why but if nest says dont do it do not do it.
Make sure you press firmly until you hear it click into place. Disconnect the nest from the usb cable and hold down the nest ring for about 10 seconds or until the display goes black. Nest thermostat battery charging problem and solution. Some heat pump installations may have the auxiliary heat connection labelled as x w1 or w2 on the thermostat. It will deplete if the system is off for too long. Press the nest ring again to turn back on the device and release.
Also there are chances that your nest thermostat battery wont charge so you have to look into this issue. Therefore it is probably not an issue to troubleshoot. Lets help you solve the issue with the battery because it is the most common issue that more substantial number of users face. You should now see the nest animation as it starts back up. If you have fuses make sure none have been blown and need replacing. The nest appears only to charge when the ac system is running robbing a small amount to charge itself.
Sometimes the software might be updating or the device is restarting. You can also try to remove the nest thermostat to the network then monitor the battery level if it will drop. Never try to restart the nest while its connected to a computer or power source while charging. Check on the nest itself under settingstechnical infopower. If you witness green blinking light there are different reasons. Fix nest thermostat battery issue.
You should verify that the x wire on the old thermostat is not a common wire. 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.