Wanted to add to chevor's statement of isolating by unplugging. Make sure you isolate the terminations of the 12volt circuit in the fridge compartment. If you simply unplug the fridge (that sounds like the 120AC plug) you aren't changing anything on the 12V DC circuit. If it blows again, it's probably wires between the panel and where you disconnected in the fridge compartment.
I agree with other posts, don't let this stop you from going. Go old school with a cooler if needed. Make it refrigerator appreciation weekend.