On mine the 30 amp fuse holder in the fusebox was half melted internally which pulled the contact leg away from the fuse. The holder is too low of a rating for a 30 amp circuit IMO. When this circuit fails nothing comes on. No vent - nothing. I had to put a jumper in because the cleanup I did didn't last too long and failed. I took a live feed via a scotch lock and put a male plug on it and plugged it into the good (motor) side of the fuse holder.
