Step by step procedure. http://www.repairclinic.com/vwo12/RepairHelp/Appliance-Repair-Help-Lawn-Mower-Repair-Help-Small-Engine-Repair-Help
make sure your vent hose is not crimped/plugged, also out vent of hose. House fires.
The dryer stays cool by having an UNrestricted air flow thru hose, otherwise parts heat up and fail.