Steve I have a Maytag Neptune MDG4000BWW, Serial #31617146YU that only heats only on every third drying cycles. If I manually move the knob to another position I can get the unit to heat up. I think this might be the timer. Does it sound like it needs to be replaced?
Answer Steve, based on your post information and description, the timer WP33001730 / 33001730 may be the place to start. It is possible for the internal cam wheel or the heater cam switch to be weak or damaged and causing the dryer to heat on an intermittent basis. Read More... Answered by AppliancePartsPros.com | Wednesday, January 10, 2018