Hair dryer repair

Of course, given the penny price, it’s easier to buy a new one, but still sometimes it’s nice to repair something with your own hands. Like an old hair dryer.

Absolutely any hair dryer can be divided into two main elements - a heating element and an electric motor. The heating element is usually a nichrome coil, it is she who heats the air. And DC motors create a warm directional air flow.

Electric motors in hair dryers are 12, 24 and 36 Volt, but sometimes in very cheap Chinese models there are 220 Volt electric motors. A propeller is attached to the motor rotor, which ensures the removal of warm air from the spiral. The power of the hair dryer varies from the thickness of the spiral and the power of the electric motor.

Consider the design of the hair dryer in more detail:

1 - nozzle-diffuser, 2 - body, 3 - air duct, 4 - handle, 5 - anti-twist cord, 6 - "Cold air" mode button, 7 - air flow temperature switch, 8 - air flow speed switch, 9 - "Turbo" mode button - maximum air flow, 10 - loop for hanging the hair dryer.

The body of the hair dryer consists of two plastic halves, a front and rear ring and a mesh. The grid hemisphere is dismantled by a slight counterclockwise turn. The hardest part is pulling out the rear ring where the mains wire enters the base. This ring has lugs with holes and latches. The front ring is removed, although a little easier, but it also has two latches on the halves of the case and recesses in the ring (in the photo below, only one protrusion is clearly visible and the ring is worn before it).

the main elements of the hair dryer and the diagram in the photos below:

First, the front metal ring is removed, then the back mesh hides two self-tapping screws under it, unscrew them and remove the back cover from the handle (latched). Under the overlay are five self-tapping screws unscrew them.

Inspection revealed a classic violation of contact in the button that turns off the air heating. The contact moved a little and stopped closing the coil heating circuit. The repair was reduced to the correct setting of the contact position and fusing the top of the plastic stand with a conventional soldering iron

Job instability. Hair dryer switched off intermittently. First you need to pull out the plugs on the hair dryer handle. You can remove the plugs with a sewing needle or the sharp end of a thin knife.

Under the plugs are screws for a special U-shaped screwdriver. After disassembling the handle, we see - the warm air supply switch (blue), the hair dryer power switch (red). Here it is necessary to inspect everything very carefully in case of a quite probable break in the conductors or melting on the switches.