Also check to make sure your 12 volt disconnect switch at the outside panel where the level switches are is pulled out. The fridge needs 12 volts to work properly.
My fridge was chasing the outside temps and the fans were not working. I thought I had bad fans or the heat switch for the fans was bad.
Since we were always plugged into shore power I never noticed my 12 volt disconnect switch was pushed in. (Easy to do without knowing).
Once I pulled out the switch and 12 volts was restored to the fridge, it now stays at the 36 to 38 degrees on setting 3.
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