I understand because its under warranty that you may not want to try to fix it yourself, but if you do then I think the place to start is at the fuse panel. Does the fuse that blows have more than one wire attached? If only one wire I would guess that the frig board has a problem. If there is more than one wire, I would unhook the others to see what doesn't work, and also to see if the fuse still blows. If it doesnt blow fuses with the other wires removed then one of them must be the problem and you will need to attache them one at a time to see what circuit has the problem. Finding intermittent shorts can be interesting. I would expect the refer to be on a circuit by itsself though someone else posted that they had the furnace on it also, so there goes that theory. I hope you find it and have a good trip.