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About Advanced Features & Operation
FACTORY DEFAULTS - If, for any reason it is desirable to
       return all stored settings back to the factory default
       settings, press the Mode button.  While holding the Mode
       button in, press the Down button for 2 sec.  All icons will
       appear.  Press and hold in the Fan button until Fd
       appears.  This resets all factory settings. To calibrate
 room temperature, press the Mode button once more.
       At this point use the Up and Down buttons to calibrate
       room temperature, if needed.  Press the Mode button to
       return to normal operation.  NOTE CAUTION ON PAGE 1.
About Advanced Features & Operation