About 10 minutes later blinky green light and unit in unresponsive. But if this continues for longer than a few minutes see the article below for more troubleshooting.
Nest Learning Thermostat 2nd Generation Troubleshooting Ifixit
Nest thermostat blinking green light. Nest thermostat blinking green light non responsive fix duration. Troubleshoot when your thermostat wont turn on if your google nest thermostat wont turn on and you see a blinking red or green light or no light at all there could be a power issue or your. A blinking green light will appear if the nest is turning on restarting or updating. It should automatically turn on when finished. If the light is still blinking after reconnecting the device restart it by holding down the thermostat ring for 10 seconds. Nest thermostat lost wifi and cant find any networks quick advice duration.
It should automatically turn on when finished. A blinking green light near the top of your nest thermostats display means that its updating the software starting up or restarting. Typically this will only last a minute or two. Give it a few minutes and then remove reconnect it nothing. If it takes much longer time check to make sure the display is correctly connected to the thermostat base. Removed it reconnected it to the pc and it wakes up again.
Battery is too low to start. If the lights continue to blink for more than 5 minutes remove and reconnect the display. Hold down the ring for 15 seconds nothing. You may see a blinking green or red light at the top of the nest the thermostat animations are very slow and unresponsive the nest complains about a low battery and wants to shut down if you have any of these symptoms please try these simple steps to return your nest thermostat to a working status. The thermostat shows a notification that says please remove the thermostat from its base then reattach it the thermostats display wont light up and unresponsive you may also observe a blinking red or green light above the display the thermostat cant control the corresponding heating and cooling units. A small flashing green light on the nest thermostat display usually means that its updating software.
During this process the display will restart which usually only takes 1 2 minutes. Your thermostat has a green blinking light if a green blinking light suddenly appears it just means that your nest is automatically updating its software.