New home and Nest thermostat issues

[Bigweed]

I have just moved into a new home. The previous owner left the Nest thermostat behind for us, but it is connected to their Nest account. I have gone into Settings-Reset but there is no option to reset 'Account Connection'.

I also cannot for the life of me work out which Nest I have. And I have gone through the Google Nest page to work it out loads of times.

Can anyone help me identify my Nest model, and also how I can remove previous owner 

Pics of Nest:  https://imgur.com/a/8zUBOti 

[David_K]

@Bigweed 

That's the Nest Learning Thermostat (3rd gen).

Important: Before you reset your thermostat, write down the wiring information so you can easily enter your thermostat's wiring if needed. On your thermostat, go to Settings > Equipment. You might want to do this for other settings, such as system heating type, and safety temperature as well.

To reset it, follow these steps:

1. On the thermostat, go to Settings > Reset > All settings.
2. Follow the setup steps: Add your Nest thermostat to the Nest app - Google Nest Help

Setup the thermostat using the Nest app. The QR code and setup key are in the settings on the thermostat itself and are not printed on the device.