I got my nest thermostat working with Google home however it only stays
functional for a day or so. Policy app and my Google home are not able
to reach the nest thermostat. When I look on the device it says it's
online. If I reset the nest thermostat...
Tech support at Nest helped me fix it. I had the Nest App and the google
home app on my phone. I only needed the google home app. I ended up
uninstalling the Nest App and doing a factory reset on the Nest
Thermostat then I re-added it to google home....