When we lived in an RV during severely cold weather, I rigged up a 60 watt incandescent bulb and set it inside the back of the refrigerator. That fooled the refrigerator into believing it was warmer outside. It works great and is well worth trying.
You should have a spare 110-120 volt receptacle back there that you can plug one of those bulb sockets that plugs directly into the receptacle. If 60 watts doesn't work, use a 100 watt bulb.
Orv
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