How do I reset the thermostat to factory default settings?

Navigate to Installer Setup Number 0710 in the Advanced Settings Menu and change the option from 0 to 1 to reset all Installer Setup options to default values and reset the schedule to default settings. Only the calendar settings and time are retained after the reset. To access Installer Setup, press the System key from the home screen, then press and hold the two blank keys on either side of the center blank key for approximately five seconds. (Page 17)