Servicing a Fan: The fan in a hair dryer pulls air in through a vent and pushes it out the nozzle. That is, an on/off switch will indicate an open circuit (continuity light off) in the OFF position, and a closed circuit (continuity light on) in the ON position.įan-speed switches and heating element switches will show continuity in all settings. Step 3: Using a continuity tester or multitester, make sure the switch functions as it should. Step 2: Switches will be mounted in the handle or main housing between the electrical cord and the fan motor and heating element. Screws are typically recessed near the motor vent. Step 1: Unplug the hair dryer and carefully unscrew and remove the housing. However, they are all tested and replaced in the same way. Some switches have only two positions: on or off, high or low. They control the current going to the hair dryer, the fan, or the elements. Servicing a Switch: On/off, fan-speed, and heat switches all work in the same way. How to Repair a Hair DryerĬommon hair dryer repairs include servicing the switch, fan, heating element, and thermal cutout. The thermal cutout switch, a safety feature, shuts off the heating element if it gets too hot. The fan-speed switch controls the speed of the fan motor and fan, thus controlling the force of the air delivered by the hair dryer. The heating switch controls the amount of current delivered to the heating element, thus controlling the heat delivered by the hair dryer. The typical hair dryer includes an on/off switch, a fan-speed switch, a fan and motor, a heat switch, a heating element, and a thermal cutout switch. Personal hair dryers come in a variety of shapes and sizes, but they all contain the same components and work in the same way.
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