Google support and their help says you can change wifi's via the app, no moss no fuss. That is a load. It doesn't work. After a lot of digging through this useless Google Support and Community, I found actual useful information on Reddit. If you change you wifi, you are going to get out the ladder and take down every single Nest's you have. Yes, it seems unbelievable that Google could be this incompetent, but it seems so. Here is the process that worked best for me.
1. Delete your home on the app. Start from scratch.
2. Take down each nest and hold the button in until it erases all settings.
3. Scan QR code and reset up just like you have already done before.
I know you're thinking, this is ridiculous. I totally agree. I just had to do redo 12 Nest's in my house. It is crazy that Google can't figure out a way that we can change the wifi name and password in the app and all the devices move over. Thanks Google you guys have been stellar recently!
