What I can't figure out is why the refer/freezer work just fine on AC power all day/night with no problems. As I stated before I've cleaned the vent,flue and the burner. Now I added 4 exhaust fans at the top of the vent. The motor home sits out side facing east, the refer temp starts to rise at roughly 3:00 pm pst. At the present time 4:00 pm the freezers reads 2.7 deg and the refer is up to 41 deg and will continue to rise. I'm starting to wonder if it is the control board.

Refrigerators