Maytag Dryer Maytag Dryer Works On Low But Not Regular?

Maytag dryer works on low but not regular? - maytag dryer

I read a lot about hair vents, radiators, and everything that can go wrong with a dryer, but there's a new twist:

Use a hair dryer will not heat. With the dryer at low temperature, but it takes two drying cycles to dry a load effectively.

I get 220v on the back, the ventilation is very good, I think, heating element, but not certain, because the heat when it is weak. Perhaps a switch broken?