By eHow Home & Garden Editor
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A hairdryer is run by a small motor and a heat element. Electricity heats the heating coil, turning the motor on, sucking air into the machine, sending the air over the heating coil and forcing the hot air out the other end. Fuzz that gets caught in the wire screen or filter can make the motor work harder and eventually die. Regular cleaning of the hairdryer adds to its life expectancy.
eHow Home & Garden Editor