I feel your pain as we have a 2013 Mountaineer which has had Dometic A/C issues since it was new. After numerous searches to resolve an intermittent problem I discovered that some wires on spade plugs that connected to the control box were not sufficiently crimped into the plugs. The wire would move around inside the crimp causing multiple make and breaks in the circuit. I resolved the issue by installing new spade plugs and making new crimps. On some of the crimp style wire nuts I also found debatable good connections. I have now soldered all of those splices and installed new wire nuts. Perhaps you want to really scrutinize all of the crimped connectors inside the unit.
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