I think it is the operating thermostat. I had an electric Kenmore Soft Heat dryer and it was amazingly fast because when the larger element cycled, there was still heat input from the smaller element so the dryer did not have to depend on those old heavy thermostats cooling down to cycle the heat back on which can be a lengthy process during which moisture removal slows. The smaller element will be on until the timer sends the machine into the end of cycle cool down or if the high limit thermostat shuts off the heat.
My KA Franken Dryer with the 37K modulating burner provides an exhaust temperature at the end of the vent hose of 165F within 5 minutes of starting.
My KA Franken Dryer with the 37K modulating burner provides an exhaust temperature at the end of the vent hose of 165F within 5 minutes of starting.