DIAGNOSIS The thermostat is in Permanent Hold mode. This overrides all scheduled temperature changes.
FIX Press the Menu button. Select 'Schedule'. Look at the current day. If you see 'Hold' or 'Permanent Hold' indicated, press the Hold button on that screen and select 'Run Schedule'. Exit the menu. The thermostat should now follow the programmed schedule.
IF THAT DIDN'T WORK Check the System Mode. If the mode is set to 'Off' or 'Em Heat', the schedule will not run. Press the System button on the main screen and ensure it is set to 'Heat', 'Cool', or 'Auto'.
HEADS UP Manually adjusting the temperature on the main screen can activate a temporary hold. To avoid this, always make changes through the Schedule menu or use the app.