A/C Dometic error codes E1 and E21??~~HELP~~

[BusyBee]

We are on the road driving 900 miles to home and our front Dometic A/C stopped working and is showing error codes: E1 and E21.

Supposed to be in the high 80's today and very humid (yes, this is Oct. 2012 and it should be cooler). Back unit does work most of the time, but drips water on the bed and doesn't cool the front much if the sun is blazing in the windows.

Our Georgetown is less than 1 year old.

Any HELP would be appreciated.

Thanks,
Doug

[BusyBee]

E21 error cleared. Now only E1 is flashing.


Anyone in the Forest have an idea what to do????


Thanks,
Doug
2012.5 Georgetown

[dustman_stx]

Not sure about those error codes- maybe someone else can chime in on that. Is the rear air non-ducted? If so and you are getting water dripping on the bed, you might pull the air distribution box- only 7 screws if it is a Dometic- and make sure the unit is torqued down and not allowing condensation to seep in under the foam gasket. As far as dealing with the heat, I would recommend checking with a Lowe's or Home Depot to see if they have any of the bubble wrap type insulation with the foil backing on one side and the white plastic on the other(We used to call it "double bubble" when I installed steel buildings, but it that may be a generic term). It can easily be cut to fit into your windows and helps a LOT with keeping the camper cool. Be sure to face the foil side out.

[joelek]

Not sure if your error codes are on thermostat LCD. IF so, error codes for this unit below. Remember reading about this in another thread. Cycle power and look for loose connections.

Error Code:
E1 Loss of communication between the CCC 2 thermostat and all system power
module boards. System will shut down.
E1 Loss of communication between the CCC 2 thermostat and an individual system
power module board. The LED will display error code EI and the zone number
that lost communication. Any additional zones that loose communication will
blink in addition to the current zone.
E2 Open circuit or out-of-range indoor temperature sensor. All heat , cool, and dehumidify
operations will be locked out. Manual fan operation will continue.
E3 Shorted Indoor Temperature Sensor. All heat, cool, and dehumidify operation will
be locked out. Manual fan operation will continue.
E4 Open 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.
E5 Open circuit or out of range Freeze Sensor. Air conditioner and dehumidification
operation will be locked out. Heat pump, furnace, heat strip and fan operation
can continue to operate but displays the last temperature set-point.
E6 Open circuit Humidity Sensor (Select Models). Air conditioner and dehumidification
will be locked out. Heat pump, furnace heat strip and fan can continue to

operate.
E7 Loss of 120 VAC power to all power module boards on the system. The system
will shut down.
E8 Invalid zone configuration. The heat pump and heat strip DIP switches are both
set to the ON position in one zone. Heat pump, heat strip, air conditioner, and
dehumidify operation will be locked out in the affected zone.
E9 Invalid zone configuration. The dehumidifier DIP switch and either the heat pump
or heat strip DIP switches are set to the ON position in one zone. Heat pump,

heat strip, air conditioner,

[BusyBee]

Thanks, I appreciate your suggestions!

[BusyBee]

Thanks for the advice and error codes!!