How to Disassemble and Repair a HairDryer

A hairdryer can be used for a variety of purposes, but one of its main purposes is to dry your hair. Hairdryers come in a variety of designs and price ranges. It is clear that a good device cannot be cheap. And if it breaks, and even at the wrong time, this is a cause for disappointment. But do not throw away the device and run to the store for a new device. Most problems can be fixed on your own. Anyone can handle this if they know how to disassemble a hairdryer, its features, what breakdowns occur most often, and how they can be fixed on their own.

Internal organization

Before you start disassembling the device, it would be nice to find out what is inside and what it generally consists of. In principle, this is a fairly simple device and there are not so many basic elements in it. Each hair dryer consists of:

Now it is clearly seen that the apparatus is quite simple. Self-repair is quite possible. Below we will take a closer look at the main reasons why a hair dryer does not work and what can be done to fix them.

How to Disassemble a Hairdryer

Now the tools are prepared, the desire to repair the device has not disappeared, but how can this device be disassembled so as not to damage the fragile plastic?

But disassembling the case can be a problem since the manufacturer is confident in the reliable operation of his device and did not at all take care of the quick and safe disassembly of his device.

The case can simply be held on with latches. And if you know where they are located, it is enough just to squeeze them out to open the patient.

The outer parts of the housing can also be connected with screws. But not ordinary ones, but non-standard ones, which can have several types of contact faces on the head:

  1. A plus.
  2. Star.
  3. Fork.
  4. Triangle.

There may be only one self-tapping screw, covered with a decorative sticker, and then both parts of the body are connected with latches.

You must be very careful and careful not to accidentally break off the latches. And it’s very easy to do it. It is enough not to notice a self-tapping screw or screw hidden under a sticker or a decorative plug.

There are also hairdryers in which the handle rotates in several positions. Here you need to be extremely careful and remember the order of disassembly of all elements. Otherwise, reassembly may not work.

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Hairdryer Circuit Diagram

The simplest model is able to simply dry the hair with hot air.

More complex instances have three blowing options:

  • warm
  • hot
  • cold.

And also there is a fan speed control “more / less”.

The heating element in a simple version is a nichrome spiral thread.

It is clearly seen that after the current passes through the spiral, which has its own resistance, it loses its strength. Now he needs to get on the electric motor. But first, it straightens through the diode bridge and, only then, it goes to the electric motor.

The motor is connected to the impeller. It is she who supplies the outboard air to the body of the hairdryer. Passing through the hot coil, the supplied air warms up and exits this hair dryer through the nozzle.

The whole device is controlled by an external switch, which makes it possible to:

  1. Turn on/off the device.
  2. Adjust the airflow rate.
  3. Select heating or fan mode.

Modern models are equipped with protection that will not energize the heating element if the motor is not turned on.

There may also be a thermostat – it does not allow the spiral to overheat much and will turn off the power supply in time.

If there is a wiring diagram for the device, we will repair your home hair dryer together, but in order to understand what is wrong, we turn to possible malfunctions.

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Possible faults

Despite the seeming simplicity, the hairdryer has something to break:

  1. The power cord may have an internal break or short.
  2. The thermal fuse has failed.
  3. Resistor burnt out.
  4. There was a breakdown of the diode bridge.
  5. Burnt out the capacitor.
  6. The mode switch itself is broken.
  7. Cold air switch failure.
  8. The motor shaft jammed due to the winding of hair on it.
  9. Stuck motor shaft bearing.
  10. The engine itself burned out.
  11. Broken nichrome helix.
  12. Closing the heating coil.
  13. Nagar on the spiral.
  14. The fan blade broke off.

This is the entire list of possible faults.

We will focus only on typical breakdowns that we can fix on our own.

Characteristic signs of a faulty device:

  • The device does not turn on;
  • The device turns on, but the fan does not spin or does not gain momentum;
  • During operation, the engine sparks and smells of burning;
  • The hairdryer only blows cold air.

We Start Inspection and Repair

As we have already said, it is quite possible to disassemble the device on your own, if you are extremely careful and follow the procedure.

Repair of the device is also subject to its own logic, which we will discuss below.

If everything is in order with the outlet, we proceed to check the power cord. Kinks and twists are common causes of network wire failure. When the hairdryer is disassembled, the contact points of the wire to the mode switches are also carefully inspected. To carry out this procedure, you will need a tester.

If the wire is damaged, there is no point in repairing it. It is necessary to replace the entire wire with the plug as a whole.

Breaker and Switch

We also check the power button itself. It should turn on smoothly and without jamming. There should be no traces of soot and melting on the switch contacts.

The three-position switch is checked by turning on each mode separately. Before checking the switch, it is worth marking all the wires so as not to confuse the reverse connection points.

Clean damaged areas with fine sandpaper and solder with a soldering iron.

If the switch itself is out of order, the best option is to replace it with a new one. But if it is not possible to find a new switch, as an option to bypass it and connect the power wire bypassing the broken switch. Since there will be no power button now, the device will turn on immediately after connecting the device to the outlet.

Fan

The fan is responsible for the formation of the airflow. On the back of the case, there are special holes for air intake. The fan impeller is made of lightweight but durable plastic and rotates on a metal rod. On the one hand, this metal axis is a continuation of the electric motor, and on the other hand, it rests against a special hole in the device body, which acts as a support sleeve. It is the impeller through the holes in the body of the hairdryer that takes in outside air and drives this flow towards the nozzle.

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