Dometic fridge just quit cooling no fuses blown.

Ok I'm assuming that's the part at the end of the wire inside the fridge that I said had slid down? At any rate the fridge is still working fine now and I will check that out also I need to climb up on the roof and inspect the chimney as well as the black tank vent seeing as how the head has always bubbled back up when flushed. Again thanks for all the good input guys.