Read comments on your site for the problem. Someone had the some problem and told how he fixed it. I ordered the same part he did. The main control knob, which is called "Timer". Replacing was easy. Switched the circuit breaker to dryer off. Remove the screws holding small cover directly behind the knob with nut driver. And the 2 screws holding the timer. Removed the timer. Moved wire connectors to the new timer. Screwed the new timer in. Screwed the cover back on. Switched circuit breaker back on. Gave it try. My dryer heats now in all cycles.