Started shutting down mid-cycle (got "PF" code). Felt too hot inside dryer. Cleaned hose and vent, used on lower temperature for short time. Now won't start, all lights are on, all controls working, and hear switch "click" when depress "start," but does not start. Got F-01 code. Have checked circuit breakers, lint trap screen and internal tub edges for coins, lint, etc...see nothing.