Learn how your appliance is supposed to operate so you can determine if it is malfunctioning.
The drive motor turns the blower and the drum. Overload protection is provided by a thermal protector embedded in the motor windings. The thermal protector is actually a thermostat in series with both the run and start windings. If the motor temperature exceeds a preset level or draws excessive current, the protector will open and motor will simply stop. There is nothing you can do to reset the switch except wait for the motor to cool down. You should allow about 30 to 45 minutes for cool-down to take place. The dryer will not start by itself when the protector resets. If the dryer starts again after it cooled off and you pushed the start button, it was overheating prior to the shutdown.
Likely causes include worn drum bearings coupled with too many clothes in the dryer, the motor run winding that is beginning to short out, 'tight' motor bearings or possibly the motor air vent ports plugged with lint, restricting air movement through the motor.
Worn drum bearing surfaces next to the door, at the rear of the drum and in the rollers at the rear and underneath the drum will make noise when they are failing. The most likely cause of motor overheating is a dying motor. The run winding insulation can break down and cause the windings to short out. Eventually the motor current goes up along with the temperature in the windings. Resistive heat causes the resistance in the windings to go up further which generates more heat for the same motor current. This all leads to a spiraling motor heating problem until the internal thermal overload switch trips. A motor whose windings are shorting out will signal its plight when it starts up. If you hear a 60 cycle buzzing sound when the motor starts, it may be slowly dying.
If your dryer is stopping before it is finished drying and nothing happens when you push the start button, wait 30 minutes to an hour and try to start it again. If it restarts after a cool-down with the buzzing sound, you are a candidate for replacing the motor. The procedure for replacing the motor is as follows:
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All of the information in these Appliance Clinic procedures is provided FREE OF CHARGE. No liability is assumed by the author for the accuracy of the contents or damages caused by the use of these procedures.