The 2118 has a total of 5 cooling fans and ALL must function for this model to operate. You have 2 internal fans, 1 for the freezer and 1 for the refer. You also have 3 external fans --2 at the top below the condenser fins and 1 below about 1 foot from the back bottom. ALL must function for this refer to cool correctly. I would be checking the operation of these fans and also HOW the refer was installed in the RV. These large RV refers require that they be installed exactly to spec for ventilation requirements. IS THIS REFER IN A SLIDE ROOM? If so, then ventilation is extremely critical and the exhaust of the hot air out the top door is also critical. Doug