My refrigerator in my horse trailer has all but stop working. The freezer gets a little cold and the refrigerator part stays warm. My propane and electrical mode are both working fine. I talked with a service tech at a RV place and he said I have blockage and to hit it with a rubber mallet. I spoke with the service department at a horse trailer dealer and he said the same thing. He said a replacement frig is $2100 installed. Cooling units are $450 and then installation cost. Does anyone have any ideas? I did bang on it the coils and it didn't do any good. I've watched the youtube videos and the Amish sell cooling units for about $450. Must be somewhat common. Any thoughts, advice? Ice chest is looking pretty good about now.