What causes a temp fuse on a dryer to blow. Is there another problem that I need to address instead of buying more fuses?

I would check your dryer vent to be sure it is not plugged with lint. The dryer pipe and vent outside are one of the most overlooked items in a home for routine maintaince. Also the inside of the dryer can become overloaded with lint. The lint screen does not catch all the line.