Just an UPDATE.
I took the MH in to have the cooling unit replaced. They put it in but there were still other problems. A week before they received the new cooling unit, I went in and asked them if it would be better just get a new refer. Well they finally put a new one in. They installed a Norcold instead of the Dometic. When I got it home, I put the temp controller on 9 to make sure that it would be cold. When I checked it, the Freezer was 20 degrees BELOW zero and the Frig was 20 degrees. I have finally lower the cooling number to 3 and it seems to be much better. Still a little cold but not a Deep Freeze. The Dometic would never get below 0 degrees in the Freezer. It was 10 years old.
This is what I am wondering: This was one of the Dometics had a recall several years ago because of fire damage concerns. They installed some guard around the gas burner to keep a fire from spreading. I wonder how many other of these Dometics are going to spring a leak and have to be replaced. Dometic should have replaced at the get-go.