Electrical Issue

The GFI was tripped. Thanks to all for your responses. Very helpful.

Sounds like it has a mechanical knob and switch. Check for 120 at the receptacle. Then at the back of the fridge where the cord connects to it.
This may help even if it is not your exact model.
Service manual

Thanks to all for your input. Will follow up after testing.

You do not need a 30 amp power source for the refer to work. You can just plug the rig into a 120 vac power source. Using a volt meter check to make sure there is power to the outlet that the refer is plugged into. Once that has been check then we can trace it to the problem.

Check for tripped GFI.

It is a small Dometic unit, don't know the model number. It has 3 power sources, gas, DC and AC. My pop up does not have a battery installed so the fridge has always been powered by AC power. And yes, all lights work and the air conditioning works fine. I did not think to check the other outlets inside the camper because I thought the problem was with the outlet that the fridge was plugged in to. The fridge worked fine when plugged into the camp sites power source. Since I don't have a 30 amp circuit at home I don't have a way to test the outlets inside the camper without returning to the camp site and using their power source.

What is make and model of the refer. Most require 12 volts DC to operate the control.
Does the other 12 volt DC items work? Lights, water pump, furnace?
There should be a fuse or circuit breaker adjacent to the battery.
If not then you could have a dead battery or yes the converter could have issues.

Thanks for the quick response as I am selling the unit and want to make sure everything works properly. I did check the fuses and reset the circuit breakers. At least I think I did. Apparently the breakers don't trip like a house breaker where they trip to the off position. It appears these breakers break internally and they have to be flipped to the off position, then on to reset.
Any other suggestions?

Check your breaker box for a tripped breaker