The A-liner RV Refrigerator Not Cooling

The A-liner uses a Dometic model 4223 gas, 12 volt and 120 vac refrigerator. With gas it was cooling by only 10 degrees cooler than the outside temperature.

I removed then disassembled the burner assembly. All seemed clean except for the burner jet which was corroded some. The miniscule hole that limit’s the gas appeared to be corroded slightly. I cleaned all with Super Clean then alcohol using an old toothbrush and then reassembled. Now the flame is extremely blue to the point it is hard to see in sunlight.

After several hours of operation the refrigerator measured 35 degrees while the outside temperature was 80 degrees. Looks like all is working.

This is the clean burner assembly.

This is the jet (before cleaning) with the small hole in the center.