Locked out of thermostat

[Lisal104]

I just bought my house.  The neat thermostat I put a pin on and now can't remember it.  I didn't install the nest app and now can't fix the issue.  How do I reset pin with no app. I don't know what nest thermostat product I have.  This forum made me pick one

[David_K]

If you can't control it using the app anymore, you'll need to reset it using a computer.

1. Connect the Nest Thermostat display via USB to a computer.
   
   
2. Verify that the Nest Thermostat mounts (appears as an attached drive icon).

• If the Nest drive will not mount: Restart the thermostat and the computer.
• If the Nest drive still won't mount: Connect another device to the cable to see if it appears as an installed device.
• If it doesn't appear, use a different cable/port/computer.

If the Nest drive is successfully showing up on your computer, can you see a technicalinfo.PLIST file? If you get this far let me know and I'll ask a community specialist to assist with next steps, as these can't be shared publicly in the community.