Reset HVAC Equipment Settings
You can quickly restore all HVAC equipment settings on the Smart Si thermostat back to their factory defaults. Any user setting (not related to the equipment installed) will remain unchanged.
If you need to reset the entire thermostat back to its original factory default settings, including user settings and registration, select Reset All Settings instead.
To reset the Smart Si thermostat: From the Home screen, press MENU. Select Settings ▶ Reset. Select HVAC Equipment Settings. Select Yes.