I have had an issue with my refrigerator not cooling well on gas while underway. I start out at 33 degrees and it heats up to 58 or so on a 80 degree day. After a little research i thought I should start by checking the regulator pressure and after building a Manometer using this nice description and testing procedure on this site RV U Tube Manometer
I found that the pressure was set too high at 18 inches with the refer, water heater and furnace running. I turned it down to 11 inches with all running. I did notice that the water heater, stove, furnace all have their own regulator but the refer does not.
Not sure if this will solve the problem but I can only assume the burner flame wasn't working efficiently at higher pressure.
Anyone have the same problem?