dryer heats even with door open but does not turn
why would my whirlpool dryer heat up even when the door is open but does not turn when you close the door.model LER4634PQ
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The heater is most likely grounded out. When this happens the heater will heat all the time. When the heater starts heating all the time it will blow the thermo fuse because it overheats. When the thermo fuse is blown the dryer will not turn on but the heater will still heat because it is grounded out. You can check the heater and the fuse with an ohmmeter. Check out this page How To Use An Ohmmeter
Be sure to unplug the dryer until the repair is done and leave it unplugged during testing.
The heater and the thermo fuse are located on the back of the dryer. The thermo fuse is a small white fuse on the left near or on the air duct.