Thermostat is Already in Use During Registration
Thermostat models XL824, XL850, XL950, and XL1050 have a unique identifier referred to as an AUID, which identifies the device to the Trane® Home network. This AUID is registered to a customer network when the device is installed.
If you are seeing this message, the previous homeowner did not unregister the thermostat from their account when they moved. This can only be corrected by Trane Customer Support via telephone.
XL824, XL850, and XL1050 Thermostats:
From the home screen on the thermostat, press Menu.
Select System Info. Depending on the firmware, the AUID may be displayed here.
If the AUID is not displayed on the System Info screen, press About on the left side.
The AUID will be 8 characters long. Please make note of it and have it available when you call Customer Support.
- From the home screen of the thermostat, press Help in the lower-left corner.
- Press About at the bottom of the page. The AUID will be listed here.
- The AUID will be 8 characters long. Please make note of it and have it available when you call Customer Support.
Once you have obtained your AUID, please call Trane Home Customer Support. We will also need the full address of the home for verification.
If you have any questions or need assistance, please contact Trane Home Customer Support via email at firstname.lastname@example.org or call 1-877-288-7707, Monday-Friday 9 AM – 8 PM ET, and Saturday 10 AM – 5 PM ET.