Nest Learning Thermostat: QR code not recognized, after manual entry... SN does not match (SOLUTION)

[Tx_Manx]

I successfully installed a 'plain' Nest Thermostat is few weeks ago upstairs. Now attempting to install a Nest Learning Thermostat downstairs. As instructed, I fire up Google Home and hit the '+' answer the initial questions and finally get to the 'scan QR code' step...

ISSUE #1:  GH claims "Error! Unable to start device pairing. Configuration not available."  I click 'OK' and I am kicked all the way back to the Google Home page... (argh : /

Solution: Do not select "Nest Thermostat" (This is a precise brand name for a specific Nest product, not a collective noun that casually references any Nest-branded thermostats. Instead choose the "Other Nest Thermostats', which will require you to install the Nest app, etc. 

[David_K]

Great tip! For absolute clarity:

• Nest Learning Thermostat and Nest Thermostat E must be setup in the Nest app.
• Nest Thermostat (released in 2020) must be setup in the Home app.

A great article that helps you work out which model you have:
How to tell which Nest thermostat you have - Google Nest Help

[zoeuvre]

Hi Tx_Manx, 

Thanks for reaching out to us. I'm glad that thing has been sorted out on your end already, and I appreciate your gesture of doing the troubleshooting on your own and for sharing the steps you've done.

In the meantime, I'll go ahead and lock this thread within 24 hours. If you run into any more questions in the future, please feel free to create a new thread.

I appreciate your help, @David_K. 

All the best,

Zoe