Once your thermostat has finished starting up it will turn on so you can use it. It seems to be stuck in some sort of delay loop of about 10 seconds blinking green light followed by maybe 2 seconds blinking orangered light.

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Nest thermostat blinking orange light. If you need to heat your home while heat link is disconnected press the large button in the middle of heat link to manually turn on your boiler. A blinking green light near the top of your nest thermostats display means that its updating the software starting up or restarting. You may see a blinking green or red light at the top of the nest. Nest thermostat e blinking light issue thermostat. To perform a hard reset hold down the orange button for 20 seconds. The thermostat animations are very slow and unresponsive.
If you have a nest learning thermostat and the light on the heat link is yellow it means the heat link has lost its connection with your nest thermostat. The nest complains about a low battery and wants to shut down. Press the thermostat ring to bring. The nest displays a message that asks you to remove the nest from the base and then reattach it the nests screen is dark or unresponsive. If the light still doesnt start spinning when you push the orange button try performing a hard reset. For step by step instructions on how to replace the battery follow this guide.
To check your battery level. This means your nest detected a problem with the thermostats wiring or internet connection. After releasing it the light on the front will flash a few times indicating that your ring doorbell is restarting. It goes through this blinking cycle about three times then stops and doesnt start up again for about 5 minutes. Typically this will only last a minute or two. Orange light on the nest thermostat might be a battery issue.
If the nests display is fully seated to the base the light at the top is off and the lcd isnt showing anything a faulty battery may be the cause. Lets try to check the battery level of the nest thermostat heres how. Hopefully this article helps you identify and fix the problem with your nest. To determine the exact issue youll need to look up the error code and troubleshooting instructions for your nest model.