If that was NOT the cause of the problem, then you will need to inspect thevent hose on the back of the dryer. Commonly thisHOT AIR VENT HOSEwill become clogged, caked or full of lint that is constantly being r
Once you can get something out of the outer case, there's no need to disassemble it further. It's best to take out all of the keys and big, loose items so they don't get broken and the plastic shavings you'll make by cutting the case can be vacuumed away, but anything small ...