Could be wrong but as I understand it the overheat caused the material around the fridge to catch fire not the cooling unit itself catching fire. It is however just pipe.
We have been without a fridge since Nov 1st, now as norcold is finally willing to back the warranty on a cooling unit installed last Feb 2015....maybe. We have so far had to take 1 500 mile trip, and next week we get to take another.
We are ft and do a fair amount of boondocking otherwise the rf would have already been in the coach.
So far norcold/thetford customer service has not been the best. It was only after a registered letter to one of the officers of the co. Did we finally get some attention.
Thank goodness for neighbors with chest freezers and little fridges to loan.