[loveljh]

My Whirlpool Duet dryer is heating. What could it be?

[denman]

Here is a manual that should help
Free Appliance Repair Forum - Downloads

First item to check would be the thermal fuse, if the motor is not running
If motor is running check the heater for continuity and the thermostats

All thermostats/ cut offs should be zero ohms at room temperature
Remember to cut off the power before doing this and remove one wire from it when measuring it