An electric hair dryer produces an instant blast of hot air, warm, or even cool air to help dry and style hair, yet many models are light enough to be held in one hand so that the air flow can easily be directed. The dryer contains a very long coil of thin wire that develops heat. A jet of air blown by a fan behind the heating element carries this heat through the nozzle and in the direction you choose. If the air flow is obstructed and the air becomes too hot, a thermostat cuts off the power to prevent burning out the motor.
The typical hair dryer includes an on-off switch, a fan-speed switch, a fan and motor, and a heat switch. Larger hood-type dryers work on the same principles with the same key parts, so the same repair instructions apply. Heated styling brushes are essentially the same in function, parts, and repair.
What Can Go Wrong with a Hair Dryer?
Because hair dryers are simple small appliances, few things can go wrong. The electric cord may be faulty, the appliance may not heat, and the fan may not operate. That’s about it.
How Can I Identify a Hair Dryer Problem?
Remove the fasteners holding the housing halves together. Pull the halves apart carefully because some switches will fall out.
Here’s where to start looking if your hair dryer fails:
• If the appliance doesn’t work at all, make sure the power is on at the outlet and check the electrical cord.
• If it still doesn’t run, disassemble it to check the thermal cutout and service if necessary. Also test the motor,switches, and heating element with a multimeter.
• If the fan doesn’t work on every setting, check the fanswitch and service if faulty.
• If the dryer doesn’t heat on every setting, check the heatswitch and service if necessary.
• If the fan works but the heat doesn’t, check the heatswitch and the heating element and service if needed.
• If the heat works but the fan doesn’t, check the fan-speed switch and the fan motor and service if faulty.
What Do I Need for Hair Dryer Repair?
You can buy some replacement parts for hair dryers at small appliance parts stores and larger hardware stores. Or you can contact the manufacturer or online aftermarket parts dealers for replacement parts. The tools you may need to work on a hair dryer include these:
• Screwdrivers
• Wrenches
• Multimeter
What Are the Steps to Hair Dryer Repair?
Disassemble a typical hair dryer:
Make sure you lay out the components so they are easier to reassemble once you’ve fixed the hair dryer.
1. Unplug the dryer.
2. Remove the hair dryer nozzle and filter. On some models, they are held on by tension while on others by a small screw where the nozzle or filter meets the main body.
3. If the unit has an intake filter screen, remove and clean it.
4. Remove screws that hold the housing together and remove the housing.
5. Locate any switches, the fan, and the motor, then test them. In some cases you can see obvious damage or problems that can be repaired quickly. Or you may need to find and install replacement parts.
Remove and clean the hair dryer filter screen.
Service a hair dryer thermal cutout:
1. Open the housing as above to open the heating element assembly.
2. Inspect the thermal cutout for damage or discoloration. The thermal cutout will be connected to one of the two wires leading from the electrical cord and inside the housing.
3. Carefully use canned air to clean internal components of dust, hair, and other debris. Be careful not to damage the sensitive element wires in the heating unit.
Caution!
For safety, remember to let a hair dryer cool down before storing it.