First thing I would check (And the reason is $$$) is the fan side of the condenser unless it's a coleman (you said it was dometic. See if it'd all clogged with crud. If it is clean it. This requires you go topside and remove the outer cover and often an inner cover to properly inspect. With my XXl hands I have to remove the fan to clean unless I can "Blast" it with Compressed air (keep the PSI in the 2 digit range please).
Then try again..
Why check this first? As I said $$$ To be precise $0.00 dollars (no cost)
All the other possible issues BIG $$$ save start/run cap. and frankly *I do NOT thin that is the problem. (not saying it is not. Just I don't think it is.. I could be wrong).
