many moons ago, I had this problem and a post in this forum suggested checking the drain hole, under the fins at the back of the fridge, in the tray that diverts water to a drain cup in the back of the fridge.
Mine was closed off by ice and the fridge wouldn't work on 120 or propane.
Let the fridge warm a little, pulled the tray, cleaned it up, went outside and pulled the 'plug' at the end of the drain hose. It was clogged. I left it out.
No problem since and I full time. Try it. It may work for your situation.
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