Generally, popup users understand what is generally on a popup that is not on a large trailer/fifth wheel/or motorhome. So model numbers are not always required.
I knew what fridge the OP was talking about.
And all electrical connections have been checked from the Fridge to the switch to the converter. And it did not work and trailer was not moved, nothing jiggled, but I decided to try it on AC one more time, and it starts to work. Granted, it could be the actual switch. But for the DC/AC and propane all at once to stop, the suddenly the AC works? But at least if AC cools down, and the others don't work; I can guess it might be the complete switch assembly that is going bad.
Just got off the phone with a dealer and his statement was, "welcome to the world of Dometic;" the reason many campers drink warm beer.