Troubleshoot an M15 error on a Nest thermostat

This article applies to the following Google Nest thermostat models in the US and Canada:

Nest Thermostat E

Nest thermostat e cooling

Nest Learning Thermostat

Nest thermostat gen 3 cooling learning thermostat 4 large

How to tell which Nest thermostat you have

If you’re unable to add your Nest thermostat to the Nest app during setup, there may have been a pairing failure or a configuration error. Select the message you see on the thermostat or in the app below to troubleshoot.

You see “Your thermostat couldn’t be added to your account” on the thermostat

You see “Added to your account” on the thermostat but “! INCOMPLETE” on the Nest app home screen

Choose a section to give feedback on

Was this helpful?

How can we improve it?

Troubleshoot an M15 error on a Nest thermostat

You see “Your thermostat couldn’t be added to your account” on the thermostat

You see “Added to your account” on the thermostat but “! INCOMPLETE” on the Nest app home screen

Resume setup in the Nest app

Reset the thermostat

Remove the thermostat from the app and start setup over

Was this helpful?

Need more help?

Try these next steps:

What is the issue with this selection?

Share additional info or suggestions