I would definitely check the duct work, whether internal or exterior. That fuse is blowing because there is a restriction some where. Do some investigating starting from inside the internal cabinet, then blower chamber. You can always run the Dryer (If electric) without the 4" Hose hooked up. DO NOT RUN WITHOUT A VENT LINE ATTACHED IF THIS IS A GAS DRYER (CARBON MONOXIDE)!!But definitely run it with your wifes old stocking attached (to catch the lint) to the back and see if it still blows. That way you can eliminate the exterior duct work theory. I had my own Dryer do the same thing and found out that the little finches birds outside made a little home just inside the wall of the vent line causing a flow restriction. Also any time you have a 90' Degree bend in your vent line that eliminate roughly 8 feet of vent hose of the 40' feet that is maximum run recommended.