Unhook the thermistor. The fridge will run continually and cool way down and maybe freeze. If it does that, the fridge is ok and the thermistor needs replaced. If not, the cooling unit could be damaged.
2017 Eagle 293RKDS, factory ordered, lots of mods and upgrades.
2018 Ram 3500 crew cab long bed SRW diesel 6spd Aisin 4wd Tradesman.
B&W Ram puck 5th wheel
Mopar wheel to wheel steps