- 1). Remove the refrigerator from the RV refrigerator cabinet and set it upright. Wipe up any ammonia spills with a damp rag. Take off the back cover by removing the screws on the evaporator fins and the burner assembly cover with a Phillips-head screwdriver.
- 2). Set the refrigerator on its front, so that the exposed cooling unit faces up. Take out the old cooling unit and remove all of the dried thermal mastic remaining in the refrigerator box.
- 3). Shape the foam encasing your new cooling unit, using a wood rasp. Slide the new cooling unit into the refrigerator box to make sure that it will fit correctly. The fins should be flush against the evaporator tubes. Once you've achieved a proper fit, pull the new cooling unit out of the refrigerator box.
- 4). Open the bag of thermal mastic at one corner, using scissors, and squeeze the bag to apply thermal mastic in 1/2-inch increments to all of the exposed tubes.
- 5). Seat your new cooling unit in the RV refrigerator box carefully. Press down on the cooling unit with medium pressure for one minute to allow the thermal mastic to adhere the cooling unit to the refrigerator box. Screw down the top, sides and fins with a Phillips-head screwdriver. Set the refrigerator upright, and place it in the RV refrigerator cabinet.
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