The isotherm freezer "hinges" are just small plastic tabs. In my experience, easily broken. I dry the freezer compartment before storage, and the "drain tray", and just leave the door of fridge cracked a bit, propped open so the light doesn't go on, and right against the door so can't open further, towel in the crack.
Only repair ever to my isotherm/truckfridge has been replacing the freezer dor, because of the tiny plastic hinge pins. And, my negligence in not defrosting early enough. My bad.