How do I fix an E2 code on dometic caravan air conditioner.

E1Loss of communication between the CCC 2 thermostat and an individual system power module board. The LED will display error code EI and the zone num- ber that lost communication. Any additional zones that loose communication will blink in addition to the current zone.E2Open circuit or out-of-range indoor temperature sensor. All heat , cool, and de- humidify operations will be locked out. Manual fan operation will continue.E3Shorted Indoor Temperature Sensor. All heat, cool, and dehumidify operation will be locked out. Manual fan operation will continue.E4Open circuit or out of range Outdoor Temperature Sensor (select models). Heat pump and dehumidification operation will be locked out. Air conditioner, furnace, heat strip and fan operation can continue to operate.

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