Good Morning, Sheila!
Your refrigerator should be cleaned and serviced at least once each RVing season, as should your other LPG appliances, the furnace, the water heater, and the range. If you travel extensively in dusty or sandy areas, or if you store your coach in such an area, then it will be necessary to clean your refrigerator more often. At times, lack of use can be more harmful to LPG appliances than abuse. The three most common causes of LPG-related problems with correctly operated absorption refrigerators are dirt, spider webs, and inactivity.
Clean the rear of the refrigerator through the access door on the outside of the coach and possibly through the roof vent. You can either blow the area clean with compressed air or vacuum away the dust and dirt. At this time, conduct an overall visual inspection of the cooling unit area, paying special attention to the condenser fins situated at the uppermost portion of the cooling unit. If the roof vent opening is not protected by a screen, birds and other critters have a tendency to construct their nests on the condenser fins where it is nice and warm. This will restrict the airflow over the condenser, causing an overheating situation that could eventually ruin the cooling unit.
It is important that the propane burner is clean by keeping out soot and spider webs. We once had a refrigerator not work, due to a spider setting up home in the burner. To clean the burner after gaining access, gently knock the soot off and blow it away with compressed air or a can of liquid air. Also use low-pressure, compressed air to blow out dirt and dust in the flue enclosure.