Ceiling "Passed Dielectric" or Control Module - AC

[cavy16262]

Why can I NOT find a compatible Control Module (passed dielectric) for my Dometic 4475 Roof mounted air conditioner. Even Dometic can't help me so far????? I had a low voltage surge via a lightning strike that came into my camper via an expandable canopy touching my awning and aluminum roller. I have fixed all the other low voltage (12Volt) problems: Tank Sensors, Converter, Clearance Lights, Tail lights but cannot fix the AC unit. The AC fan won't shut off unless I turn off the breaker. All other aspects of the heat/AC work as designed>>>>>>any thoughts?
This is the box in the ceiling above the vent....gray in color. Connects thermostat to AC 110 power.

[bobbecky]

You are looking in the wrong direction. The control module is actually linked with the thermostat. On our rig, we have the Dometic CCC2 thermostat, and the module, actually called an Electronic Control Box, is the device that interprets the signal from the thermostat into a specific action at the A/C unit. About four years ago, our front A/C died, and upon checking, found a load of corrosion on the circuit board in the box. I purchased a new box, replaced the failed one, and that A/C has worked fine ever since. What thermostat do you have?