None of my third-generation thermostats are visible in the Nest App after migrating to Google accou

[pirubinfeld]

I have 4 third-generation thermostats and just purchased a new thermostat to replace a older 2nd generation version of a Nest thermostat. Before installing the new thermostat, I attempted to migrate my Nest  account to my Google account. I got mostly through the process but something failed during the process. Now I can't see any of my third-generation devices on the Nest App.

I installed the new thermostat using the google home app. I can see that device  using this app. 

I tried re-adding the existing 3rd-generation devices using the Nest app but failed because the device reports that it is already connected to an account. I tried adding the device using the google home app, but it says you have to use the Nest app to install older devices.

What is going on here? I would like all 5 nest devices to be visible in the same app--I don't care if it is the Nest App or the Google Home App. It seems like the existing 3rd-generation devices are still connected to the old Nest Account which I cannot seem to connect to because I attempted to migrate to my google account.  What's my best course of action to get all devices visible on a single app?

[MplsCustomer]

@pirubinfeld 

See this Help topic on migration issues and troubleshooting:

https://support.google.com/googlenest/answer/9297676

You may not be able to view all of your Google Nest devices in the same app.  Google Nest has been halfway between the 2 apps for years.  We've been using both apps for almost 4 years after getting a 2nd gen battery camera (which can only be viewed in the Google Home app) in 2021.

To contact Support for help in working through your situation:

1. Go to https://support.google.com/googlenest/gethelp.
2. Select a category/product family, and type in a brief description of the issue, then click "Next".
3. Select your device from the dropdown, click "Other", then click "Next step".
4. Under "Resources", just click "Next step". (Clicking one of the listed links will bring up a Help page.)
5. Under "Contact options", choose to get a phone call or chat with the team, depending on availability in your country.