I would replace the fuse holder to see if that makes a difference, buy one rated for at least 15 amps and preferably 20 amps. use a microwave oven fuse, the ceramic type. if you call me I will drop a couple fuses and fuse holder, cost under 3 bucks, in the mail for free. billing for cheap stuff costs more than invoicing.
given you notice the machine heats fast it could be a bad main board:( or bad temp sensor transistor. normally the thermal fuse blows to prevent overheating. if your within 75 miles of pittsburgh i will give you a free on site no cost no obligation estimate. In any case fell free to call me, i have helped a bunch of people from here on the phone for FREE. Sometimes talking is better
bob haller service and sales pittsburgh pa 412 366 4906, April 2012