Product review (5 stars): Stupid Easy Fix
My dryer wouldn't remain off when the door was opened and then re-closed. The cycle would end and the buzzer would just buzz and buzz and buzz. I determined that this was the culprit.

This is a stupid easy fix. TURN OFF THE BREAKER FEEDING POWER TO THE DRYER. Remove the six screws holding the back on the control panel module. Disconnect the two wires from the switch (white is on top and black is on the bottom). Pull the tab back so it is clear of the mounting surface and rotate the switch 45 counter clockwise. Remove the switch. Insert the new switch and rotate it until the tab snaps into the mounting surface. Reconnect the wires. Screw the back cover back onto the control module. Turn the breaker back on. This took 10 minutes.