When you install the Nest Learning Thermostat or the Nest Thermostat E in the Nest app, the thermostat should automatically appear in the Google Home app if you’re using the same account in both apps, using the same home structure, and have assigned the thermostat to a room in the Nest app. If any of that isn’t true, you’ll need to go ahead and fix those issues to see if you need to try the steps below at all.
Assuming all of the above is true. try these steps:
- Open the Nest app and follow the “Create another home in the Nest app” steps linked below to create a new temporary home structure:
Manage homes and products with the Nest app - Google Nest Help
- Open the Google Home app, find and delete the home structure you just created by following the “Delete a home” steps linked below:
Share a home and devices in the Google Home app - Google Nest Help
This forces the two apps to sync and your thermostat should now appear in the Google Home app.
