The fuse for the fridge is in the sleeper. Driver side outside wall where your controls are, there is a small fuse box that holds maybe 5 fuses. One of them is the fridge.
I have a 2019 Volvo VNL 760. No power to the traditional outlets in the sleeper where TV and Microwave/Fridge would be plunges in; only the 12volts. I’ve changed every fuse still nothing. there’s also this box beneath the sleeper that looks like it might be a built in inverter with two outlets on it that also have no power.
it SHOULD have a fuse in the front or back of it.... ALSO should have a 200+ amp fuse at the battery pack... find the inverter wires going to the batteries. The fuse SHOULD BE within 6" of the batteries
Does the truck have an inverter? If it doesn't the receptacles will only work when plugged into shore power.