Found thermostat was blank due to overflow switch in auxiliary drain pan tripped because drain pan full of water removed with shop vac tried calling Jim Price to find out how to turn on dehumidification mode but he is out of town until Monday will consult with him and may need to return to turn on dehumidification mode checked contactor capacitor compressor and fan clear condensate trap checked blower motor and filter unit operating well excessive humidity in home reading 78%