On your device, forget the network your Nest and device are on, then sign back in. Have to enter the password again. mine has been online for an hour or better now. Problem seems to be with device or the app, not the Nest itself as it has always shown connected to network.
Didnt know if you saw this. Mines been online ever since. Hope it works for you as well.
I wanted to ensure that everything was covered here.
@Md171, Thanks for posting and for updating us on what you've done to have your thermostat reconnected to your Wi-Fi network in the app. Please keep observing it at the moment, and if anything comes up, feel free to let us know.
@Dust and @Dar2, I wanted to see if you'd tried the steps shared by Md171. Also, I found a helpful article with some troubleshooting steps for when your thermostats went offline in the app. Please let me know if that helps or if the issue still persists.
Gotcha. I'd love to know more about it — do you receive any code on the Google Home app or on the actual Nest Thermostat? Could you please check if you see an icon with an exclamation point on the app? Also, try to use a different phone to add your thermostat.
I appreciate your help, @Md171 and Mark.
I'm sorry for the late reply. I know it has been a while, but I wanted to ensure that everything was covered here.
How's your thermostat? Have you managed to add your thermostat to the Google Home app? If you haven't yet, try creating a new home structure and adding your thermostat again.
Please let me know if that helps or if the issue still persists.