Product review (5 stars): Fixed intermittent heating failure on WED5200VQ1
Dryer would stop heating every few loads for no reason, it was really annoying. I tested all of the stuff in the back, heating element and fuses were all intact. So we had a repair guy come out and he figured out it was the timing knob that was busted. My wife had been turning it counter-clockwise since we bought it, is the only reason we can think it went out.

This took about 20m to install, super easy. Whirepool Dryer Model #WED5200VQ1