Do-it-yourself hair dryer repair at high speeds. Is your hair dryer broken? Repair and description of work. How to assemble a construction hair dryer with your own hands The hair dryer works but there is no hot air
19.02.2018
Today, the popularity of self-repair of small household appliances is steadily increasing. In addition, there are different situations. For example, you urgently need to disassemble a Bosch, Philips or Rowenta hair dryer, but you don’t have instructions at hand. What to do in this case? Today we will try to tell you more about this.
How to disassemble a Philips hair dryer?
Sometimes after an unsuccessful fall or after another mechanical impact, this device stops working. A wonderful way out of this difficult situation There will be a complete disassembly of the hair dryer. Do you want to know how to disassemble a hair dryer? There is nothing complicated about this, the main thing is to follow the steps of the instructions.
The first step is to disassemble the case. For most models (for example, rowenta pro 2300 and braun 3536), it opens into two identical halves. To comply with safety regulations, be sure to unplug the electrical cord from the outlet before unscrewing the screws.
Typically, the body of the device is held on by simple metal screws. They can be with non-standard heads in the form of a plus sign, a pitchfork or an asterisk. Therefore, before disassembling the Philips hair dryer, you will need to make sure that you have the necessary tools.
After opening the device, you will find the internal mechanisms of the device that are responsible for its smooth functioning. If the hair dryer breaks down, the cause of the breakdown will be hidden in these parts. In addition, some models have additional fastenings in the form of latches and hidden screws hidden under decorative overlays.
Do you want to know how to disassemble the philips salondry control hair dryer? To do this, you need to familiarize yourself with its internal structure and carefully inspect all the details. The most common failure of many devices is a damaged power cord. If there are burnt parts or kinks, it will need to be re-soldered.
The main internal element of any hair dryer is the fan. It is driven by an electric motor and draws air through a special opening with a grille. In some cases, the breakdown of the device is associated with its contamination, so if there is dust, it should be thoroughly cleaned.
If you hear a crackling sound and see sparks when you turn on the device, this indicates a motor failure. This problem can be solved by replacing the copper windings and diode bridge. However, it is difficult to carry out such repairs at home, so in this case you should contact a workshop.
Do you want to know how to disassemble the rowenta brush activ 1000 hair dryer? The design of this device has several nuances compared to a conventional hair dryer. In order to inspect internal elements and mechanisms in case of breakdown, you need to perform a few simple steps:
- Remove the plastic attachment from the front of the device, as it will interfere with disassembly later. To do this, it must be smoothly moved left and right until it is completely disconnected from the device;
- When removing the plastic ring, it is not recommended to use screwdrivers or other tools, as they can damage the case and leave visible scratches on it;
- Afterwards, you need to remove the rear mesh attachment, which interferes with disassembling the device. However, you should not apply a lot of force, as this may lead to its breakage;
- Modern models of hair dryers of many brands (Roventa, Remington, Scarlet and others) do not have metal bolts on the body. The two parts of the hair dryer are secured using latches. To separate them, the two halves of the housing should be pulled away from each other while rotating.
So that you do not have to repair household appliances yourself, do you need to buy from all the variety on the market? Before purchasing, you need to pay attention to the reputation of the brand, since only famous manufacturers engaged in the production of quality products. Other selection criteria are power, number of operating modes, cold air function.
We told you about the main features internal structure hair dryer, so you should not have any questions about how to disassemble the Roventa Brush Active hair dryer and other brands. However, remember that when repairing small household appliances yourself, you should follow safety rules and be sure to remove the power cord from the outlet.
- Main breakdowns and their causes
- Hair dryer repair: correct diagnosis and treatment
Using a hair dryer, you can heat up old varnish or paint to remove it from the surface. During construction, it is used for soldering metal, as well as to facilitate work with plastic pipes. When heated, they lend themselves well to bending. This tool is very demanding, and if used incorrectly, it will have to be repaired, and this is not an easy task.
Let's look at how to repair a construction hair dryer with your own hands. A person can always turn to specialized service centers for such a service, but this is not always advisable. In some cases, breakdowns can be diagnosed independently, and accordingly, the hair dryer itself can be repaired. Before doing this, be sure to get acquainted with the device. This is where the instructions should begin.
The device and its basic principles
If you open the device, you can find the engine small size, heating element and a fan. The heated air exits through the nozzle. Everything is quite simple. Basically, the structure is no different from an ordinary hair dryer. The only difference is more high power apparatus. The performance of the equipment directly depends on how many liters of air it can pass through in 1 minute. Many hair dryer models on the market today have a number of additional functions. These include:
- temperature adjustment;
- air flow adjustment;
- selection of the desired operating mode;
- numerous additional attachments that will significantly simplify working with this or that material;
- LED indicator that determines the heating temperature.
Of course, these are not all the options that a construction hair dryer may have. There are others too. You should always remember that the more there are, the more difficult it is to make repairs.
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Main breakdowns and their causes
Failure of such a tool can occur at any time during its operation. It is especially unpleasant if this happens in the midst of construction work. In most cases, the person himself is to blame for this, who often treats power tools negligently. The main breakdowns are considered to be a bend in the power cord, a malfunction of the tool’s power button and temperature adjustment. Of course, more global breakdowns may also occur.
For example, the motor or fan may fail. The heating element does not last forever in this regard. Most faults can be diagnosed independently, but there are also those that take quite a long time to identify. In this situation, it is best to contact a specialized service center.
If a person is confident in his abilities, then he can repair the hair dryer himself.
The most complex breakdowns include a breakdown of the engine or fan. In most cases, they must be replaced, and it is also difficult to find the necessary spare parts.
The other day, my irresistible, unique and intimate Wife began to complain that her beloved Remington hair dryer not working. This manifested itself as interruptions in normal operation depending on the position of the power cable. That is, if you pull the cable, the hair dryer turns off, if you press it against the hair dryer, warm air comes out. I immediately realized what was happening and began to tear my shirt and wave my favorite soldering iron - they say, let me disassemble and repair the hair dryer right here and right now.
In general, after some moaning, my screwdrivers clashed with her hairdryer in an epic battle until the first... soldering. I’ll say right away - these instructions can be used for most hair dryers from Rowenta, Braun, Philips, Bosch and Scarlett. Of course, all hair dryers are used differently, but their design principle is the same. Let's go.
Remington hair dryer disassembly
First you need remove the plugs on the handle or throughout the body of your favorite hair dryer. In my case, these are three plugs on the hair dryer handle. Lately It has become fashionable to make the hair dryer body with snaps or even fuse the two halves together.
The latches can be defeated, but if the halves are soldered, then you can only cut along the seam and then glue it with epoxy, in general there is no prospect. So when buying a hair dryer for your loved one, pay attention to its design. Easy to remove plugs a needle or a sharp thin knife. Be prepared for the plastic to bend around you and immediately warn your Wife about this. The problem with burrs on plastic can be solved at the end of the repair using the same knife.
Under the plugs I found U-shaped screws as in the photo. In general, such screws were invented against vandals for outdoor equipment and to protect equipment from inquisitive children. They are called Security.
Such screws, only bigger and with round holes They are in the elevator in my building. It’s good that I had the right two-pronged bit just for these screws. That's it, elevator, just try again to get stuck between floors.
If you don't have such a screwdriver, you can make a U-shaped screwdriver from an old one slotted screwdriver
, simply making a cut in it with a hacksaw.
After disassembling the hair dryer handle, we see the picture as in the photo - hot air supply switch (blue), hair dryer power mode switch (red), twisting of 220 V wires.
Everything is carefully here inspect for breaks any wire or scorch marks, melting on the switches.
If everything is in order here, then unscrew the two screws of the wire holder at the very bottom of the hair dryer handle. Need to find the break in the wire- usually it is located near the exit of the wire from the hair dryer handle.
Such a weak point is immediately visible if you bend the wire in half.
Remington hair dryer repair
To check strip the power cable braid at the bend point we see burnt copper wires.
Boldly cut off the wire and prepare it for installation.
As a rule, hair dryers are quite often susceptible to various breakdowns, and you have to buy a new one. The device is not the most expensive, of course - you can easily buy another hair dryer, but at the same time it is quite simple, and many people will be able to restore its functionality without much effort.
Operating principle
All hair dryers, regardless of the brand and type of case, have the same operating principle - an electric motor drives a fan, which drives air through heating coils. Typically, hair dryers have a heat level switch, providing different thermal modes - the switch switches the serial connection required quantity spirals - the fewer of them there are in the circuit, the greater the current flowing - the greater the heating. Hair dryers are also equipped with thermal protection that turns off the device if it exceeds permissible temperature spirals. If such protection works, be sure to unplug the hair dryer from the network, because when the temperature drops, the thermostat will restore the electrical circuit and the hair dryer will work.
Basic faults
Troubleshooting involves disassembling the housing. It is usually held together with a pair of screws and latches on the body halves, which are quite easy to break, so you need to proceed carefully. Although there won’t be any particular tragedy if the latch is broken - the case may well be held on by self-tapping screws, or you can apply glue in a few places during assembly, but just a little - suddenly you will have to disassemble it.
Burning smell– quite often encountered when using a hair dryer, since the fan sucks through the air intake not only air, but also hair, which then falls on the hot coil and, when burned, causes an unpleasant odor.
Another possible reason is insufficient air flow passing through the fan. This may be caused by overlap ventilation grilles by hand, or by clogging the filter, if one is provided in this model, with hair, fluff, dust, etc. A weak flow can also be caused by slow fan speeds.
Fan rotation slow– This is usually caused by hair wrapping around the motor shaft, which prevents it from rotating. As a rule, the fan is placed tightly on the shaft, and it is not possible to remove it for easy hair removal, since applying great force is risky - the fragile plastic can easily be broken. Therefore, it is convenient to use tweezers - gradually pinching off the wound hair with it until it is completely removed.
The opposite situation also occurs (much less frequently) - the fan does not sit tightly on the shaft, as a result the engine operates at normal speed, but the shaft rotates in the fan housing. The solution is simple - place the fan on the shaft using suitable glue.
The air comes out cold– in this case there may be several reasons:
- Poor contact in the mode switch - the solution depends on the design of the switch. Flexible elastic contact strips are often used open type– it is enough to bend them correctly or clean the contact points. If the switch closed type– replacing it is inexpensive.
- Broken wiring - the conductor leading to the spirals or switch may well break off or fall off at the soldering site.
- Broken heating coil. It won’t just break off - most likely it’s a burnout. It can be restored simply by twisting, but such a connection will not be durable - poor contact will gradually provoke carbon deposits, which will further increase the resistance at this point - as a result, sooner or later it will have to be repaired again. It is better to make the same twist, but then crimp it with copper or brass tube suitable diameter(a thin tube from a refrigerator compressor works well). Soldering is useless in this case - the heating temperature of the spiral will melt the solder.
– there can be many reasons and almost all of them can be easily eliminated – a break in the power cord, lack of contact in the sliding contact pair at the point where the cord enters the housing, break in the internal wiring, lack of contact in the switch, etc. The worst that can happen is This is engine combustion. If you have something to replace it, that’s good (so don’t throw away old faulty hair dryers - they are spare parts after all), but if not, then you really need it new hair dryer– there is little chance of repairing the engine.
The design and electrical circuit of the hair dryer are not very complicated and will be suitable for any beginner when studying electrical engineering.
So, unscrew the two screws and half the handle.
This hair dryer's blower impeller no longer adhered to the electric motor shaft and was secured with auto-sealant.Let us consider its structure in full and possible breakdowns.
The hair dryer consists of two circuits connected in parallel (after the switch).1. Consistently trace the passage of current through the first circuit from the connection point of circuits “A” to point “B”:
(point "A" - working heating element "RN" (green) - diode bridge "D1-D4", from which the electric motor "M" receives power - point "B").2. Second circuit:
(point "A" - additional heating element "DN" (red) - thermal switch (thermocouple) "T" - micro-switch "Vmkr" - point "B").
The three-position switch performs actions in a common circuit in three positions:1. 0 - the common circuit is broken, the power is turned off;
3. II - the switch connects the circuit directly to the network;
Let's consider circuit No. 1 of working heating with an electric motor.
The heating element is a wire wound in a spiral, which has a high specific resistance to current (for example, nichrome).The electric motor is supplied with DC voltage, obtained through a diode bridge consisting of four diodes.
Let's highlight two elements of the circuit that are consumers (loads), these are the spiral and the diode bridge (we do not count the motor, because it is the load of the bridge).
In the circuit, the elements are arranged in series (one after the other), which means that the voltage drop across each of them will depend on its own resistance and their sum will be equal to the network voltage in the third position of the switch.
We conclude:
The resistance (depending on the material and length of the wire) of the element is calculated so that during normal heating the difference between the 220V network voltage and the voltage drop across this element is equal to the voltage drop required for the operation of the electric motor, i.e. for powering the diode bridge.
U network - U spiral = U bridge.
If this equality is not observed, work is impossible, i.e. if for some reason the coil burns out, it should be replaced with a similar one with the same resistivity.If the electric motor fails, we replace it with an identical one.
A break or breakdown of the diodes may occur in the diode bridge
Household appliances make our lives much easier. However, they do not last forever and sometimes fail. Hair dryers, both household and professional, are no exception. You can repair your hair dryer by contacting a service center or repair it yourself. Many people are afraid to repair a non-working household appliance themselves, believing that its design is complicated.
We will try to refute this opinion. We will tell you about the design of the product, simulate situations in which the hair dryer does not work, and answer the question: is repair possible? household appliance at home. Let's start with its device.
Equipment and device of a hair dryer
A modern model of equipment can be equipped with:
- Electric power unit.
- Incandescent coil.
- A fan for supplying cold and/or hot air ().
- Speed shift element.
- Electrical cord.
As you can see, there is nothing complicated, so even at home it will not be difficult to cope with most of the problems of a non-working household appliance.
Photo: Read below about problems associated with stable work.
A few words about possible malfunctions
Knowing the problem will significantly reduce the repair time for a household appliance. Most characteristic malfunctions- This:
- no power: technical model does not turn on;
- the fan has stopped or its blades are not working at full power;
- when the device is operating, a characteristic burning smell is heard;
- spark appears a clear sign problems with the power unit;
- The hot air supply is stopped. There is only cold air coming out.
Based on knowledge of the device modern models, And possible reasons failure, let's take a look different options and try to solve this or that problem.
To repair a hair dryer With our own hands, we will need a certain set of tools: a multimeter, a screwdriver and a soldering iron.
Malfunction and our actions
The problem that has arisen should not take you by surprise. The first thing you need to do is not to panic, but to soberly assess the situation!
- No power.
The hair dryer cannot work due to lack of power. The first thing you should check is the outlet. To do this, you will need a multimeter test device or an indicator screwdriver. If everything is fine, carefully examine the cord. It often gets twisted and/or frayed at the connection points with the device. One more thing problem area The cord has a fastening with a plug.
Photo: In this case, it is clearly visible that the stopping of the working hair dryer is caused by problems associated with the electrical cord.
If the elements are normal, you can proceed to disassembling the hair dryer. You need to unscrew and remove all fastening elements, which, among other things, can be hidden behind stickers or rubberized plugs.
Photo: to repair the internal filling of the hair dryer, you need to disassemble it using a screwdriver.
After removing the cover and getting to the “insides” of the hair dryer, you need to pay attention to the junction of the electrical cord with other elements of the circuit. It is possible that one of the wires was simply disconnected, making starting impossible. The problem, in this case, is solved by simple soldering, or ordinary twisting of the wires.
- The cord is fine, but the hair dryer still doesn't work.
If the hair dryer does not work, we continue troubleshooting and check other elements of the circuit according to the diagram, “ringing” them with a tester. These are: a fuse, a speed switching element for a household appliance and an air supply mode switch.
In conclusion
We tried to expand on the topic and give useful advice by simulating different types of problems. They described in detail the signs of hair dryer failure and suggested ways to eliminate malfunctions. We hope that the material provided will be useful to you in the future. We recommend flipping through to secure the material. technical literature and/or watch training videos on the Internet.
Might be useful: is it possible?
Almost every home has a small device called a hair dryer. The hair dryer can be used when resining wooden skis, removing old paint, blowing sawdust from a workbench, dispersing mosquitoes and husbands, drying things, cooling a frying pan with dumplings and how to fan on hot days. A hairdryer is also useful for drying hair.
Most hair dryers of Chinese origin have a primitive electrical circuit. In such hair dryers there is only one switch, which turns on the fan and the thermal electric heater (TEH). Heating elements can be made in various modifications, but in all hair dryers they are made of nichrome twisted into a spring. More advanced hair dryers have two regulators: one regulates the blowing speed, and the second regulates the temperature of the blown air. At the same time, the scheme does not become smarter.
So, I came across a certain hair dryer made in China. The malfunction was the hair dryer's inability to change the blowing speed. There was no upper airflow limit.
As often happens in Chinese manufacturing, the self-tapping screws have a very strange head. A special screwdriver is needed for such a head. You can buy such screwdrivers, but bad luck, you couldn’t unscrew the Chinese screws with Chinese screwdrivers. Therefore, using a regular grinder from a screwdriver, you can make a cunning screwdriver under the head with the required self-tapping screw.
Self-tapping screws can be used for a positive screwdriver, a flat screwdriver, an asterisk, a hexagon, a triangle, a square and a fork. In my case it was a fork.
On the handle there are control switches for regulating the functions of the hair dryer.
The hairdryer operates on 220 V, 50 Hz. There is a paper capacitor at the input to eliminate interference from the engine. The hair dryer has two regulators. One regulator includes a motor and a powerful heating element-4, and the second – auxiliary heating elements-1, heating element-2. Without turning on the blower, none of the heating elements will start working. When the blower is turned on at first speed, the voltage is initially supplied to diode VD1, designed for a current of at least 1 A. After the diode, the wires branch to heating element-3, which limits the voltage to the DC motor connected through the diode bridge VD2-VD5 and to the second blower temperature controller , switched on through a breaking temperature contact located inside the circuit with heating elements.
The voltage after the diode VD1 from 220 V becomes approximately 155 V, and the heating element-3 limits the voltage to the diode bridge to approximately 16 V. Capacitor C1 equalizes the pulsating voltage after the diode bridge VD2-VD5. At the second blowing speed, the VD1 diode is excluded from the circuit and the voltage of 220 V drops to the heating element-3, limiting to approximately 27 V.
At the first blowing speed with the heating elements turned on, the consumption is 0.9 A, but already at the second speed the current increases significantly to 6.8 A. The current corresponds to a load of about 1.5 kW. Principal electrical diagram hairdryer is shown below.
After unscrewing the two screws, you can remove top part hair dryer body. If you can’t remove it, plastic parts hold it in place. Sometimes additional screws are hidden with stickers.
The case contains switches, a set of heating elements wound on one frame and covered with a cover. The case is needed to create air channel in which air will circulate. If you remove the cover, then the heating element will heat up the air and melt the body of the hair dryer, so when making repairs, you should not heavily load the hair dryer without a cover. The cover is made of paper impregnated with a non-flammable base and painted with heat-reflecting paint.
This hairdryer has a gadget - an ionization button, but like everything in cheap equipment, this button only turns off the block of paired heating elements.
The diode bridge with a capacitor is assembled directly on the engine itself. This saved space.
In addition to Chinese cheap hair dryers for everyday use, there are professional-grade hair dryers. Typically, such hair dryers are made in Europe, but given the fact that cheap labor is concentrated in Asia, you can also find professional hair dryers made in China.
Main Feature professional hair dryers– the presence of a motor not at 16 V with voltage reduction by means of a heating element and DC power supply, but at full 220 V AC. By design, such a motor is classified as a single-phase AC commutator motor and is equipped with brushes. The use of such an engine allows you to fully use the ionization function, which allows you to completely turn off the engine heating elements.
A beautiful element is the frame with wound spirals. Typically, spirals are wound from nichrome (an alloy of nickel and chromium). Nichrome has a dark gray color. The resistivity of nichrome is on average 1.1 ohm*mm 2 /m. The length of nichrome wire L, m is calculated by the formula
L=U 2 *P*d 2 /4*P*p
Where U is the supply voltage, V;
P – number pi, P=3.14;
d – wire diameter, mm;
P – power supplied by the spiral, W;
p – resistivity wire, ohm*mm 2 /m, p=1.1.
If it is necessary to wind a coil for a hair dryer with a power of 1200 W, designed for a voltage of 220 V, the available nichrome wire has a diameter of 0.3 mm, then substituting the values into the formula we have
L=220 2 *3.14*0.3 2 /4*1200*1.1=2.6 m
To reduce the required length, the wire is twisted into a spiral, winding it around the rod.
Modern heating elements have a silvery metallic color and are not wound from nichrome. Nichrome soft material, and the metal in the heating elements is hard and holds its shape perfectly. I don’t know exactly what metal is used in modern heating elements.
Malfunctions:
|
Malfunction |
Cause |
Elimination |
|
No increased speed blowing |
Replace diode bridge |
|
|
Capacitor C1 is faulty |
Replace (disconnect) capacitor |
|
|
No reduced airflow speed |
Diode VD1 is faulty |
Replace diode |
|
No heating of one of the heating elements |
The niphrom thread broke |
Find the break point and twist the two ends of the wire |
|
Hair dryer won't turn on |
No contact on switches |
Disassemble the switches, clean the contacts with alcohol and stretch the pressure springs |
|
Engine doesn't work |
Faulty heating element-3 |
Find the break point and twist both ends together |
|
Diode bridge VD2-VD5 is faulty |
Replace diode bridge |
|
|
Engine faulty |
Replace engine |
Without exaggeration, we can say that a hair dryer lives in every home today. This softly humming accessory blows warm air, has forever entered the women's arsenal, has become an essential item and is used not only for drying hair, but also for styling and creating certain hairstyles. However, sometimes there comes a time when something inside the hair dryer begins to crunch ugly, a wave of warm breeze turns into a north wind, and an inner voice persistently tells you that an urgent repair is needed.
Design of a hair dryer
The basic design of all hair dryers can be considered identical. Any person who owns a screwdriver and basic school knowledge of electrical engineering can deal with it.
Each hair dryer consists of four main parts:
- Electric motor .
Motors come in several types - 12, 24 or 36 volts. This is done in order to protect the user. The current from the network has a voltage of 220 V and is dangerous to human health. Using an electronic circuit, the voltage is reduced, due to which the impeller that forces air to the nozzle is powered by a small DC motor, which is absolutely safe for humans.
The hair dryer is powered by an electric motor, which is supplied with reduced power for safety reasons.
- Fan. Its task is to create air flow. The body of the hair dryer is made special holes, through which the impeller sucks in air and directs it in the desired direction. Typically the propeller is made of plastic and rotates on metal rod, which serves as its axis. On one side, the axis is connected to an electric motor, on the other, it is attached to a support equipped with a sliding sleeve.
The impeller takes air through the cracks in the hair dryer body and drives it towards the nozzle
- Heating element. As a rule, this is a nichrome spiral. When current is applied, it begins to heat up and heat the passing air to the desired temperature. IN good hairdryer the spiral is designed so that the heated air does not burn the hair, i.e. its temperature does not exceed 50–60 o C.
In advanced models of hair dryers, several spirals are installed to ensure the device operates in two or three heating modes
- Electronic circuit. Serves to convert current and adjust operating modes of the device. Using the keys located on the body of the hair dryer, you can disconnect or connect the coil, increase or decrease the air flow speed.
It should be noted that the effectiveness of the device as a whole depends on the coherence of all structural components. If, for example, the air channel is clogged and the flow rate is slowed down, the spiral will definitely begin to overheat, and this will lead to either its failure or an increased temperature of the outgoing flow. Malfunction of the electronic circuit can lead to a drop in voltage on the electric motor, as a result of which the hair dryer will not work at full capacity.
The first mention of a hairdryer is associated with the name of the French hairdresser Godenfroy. It was he who, in 1888, offered his clients to dry their hair using a patented device powered by “any heat source.” In 1908, the famous Berlin electrical engineering company AEG registered trademark“Föhn”, which translated from German meant “warm alpine breeze”. The first devices were quite bulky and heavy; the body consisted of a metal casing and weighed about 2 kg.
The prototypes of the modern hair dryer were large and heavy
Possible malfunctions of the hair dryer and their elimination
Unfortunately, equipment tends to break down. And often - at the most inopportune moment. Even expensive models produced by reputable companies can fail. The reason for this can be both non-compliance with operating rules and factors beyond human control. For example, power surges, children playing, or teething pets. Situations are different, but in any case, you shouldn’t rush to the store to buy a new device. Perhaps, having understood the cause of the breakdown more closely, you can restore the normal operation of the hair dryer without outside help, with your own hands.
The following repair information does not apply to new generation models equipped with air ionizers and infrared emitters. The design of such hair dryers is much more complicated; it is not recommended to repair them at home.
Lack of power
If problems occur, first of all you need to pay attention to the condition of the power cord and conduct a visual inspection of it. It should not get hot during operation. If there is any damage to the insulation, fractures or swelling, you need to check whether current is flowing to the device.
The hair dryer may not turn on due to damaged cable insulation
To do this you need:
- Disassemble the case and use a voltage indicator to test the power contacts inside the hair dryer. To disassemble, you need to find and unscrew all the screws on the casing. Sometimes, in addition to them, latches are used - they must be carefully separated so as not to break the fragile plastic. On some models the screws are covered decorative plugs or stickers. In this case, carefully remove them by hooking them by the edge with a screwdriver. Before disassembling the hair dryer, do not forget to unplug it from the mains by unplugging the cord from the outlet..
After unscrewing all the screws, you need to carefully pry up the plastic plugs and disconnect the case
- Next, the wires go to the power button. You need to check that the switch moves freely and is not clogged with foreign debris or stuck together dust. If the contacts are working properly, their color will be even, without signs of charring. Overheated copper turns from yellow to dark blue, which is a sign of improper operation.
It is necessary to check all contacts for charring or discoloration, which is also a sign of improper operation of the power circuit
If damage is found, the contacts must be cleaned with a knife or sandpaper, but in no case with a damp cloth. Sometimes this is enough to restore normal operation of the device.
Plug in the device for a few seconds. In this case, the power key must be in the “Off” position. or Off. To check the presence of voltage, bring the indicator to both terminals of the button.
If there is a “phase” on the contact being tested, the indicator light will light up
The best solution to the problem of a damaged power cord is to replace it with a new one. But if it is not possible to replace the cable, you can get out of the situation by stripping the “bad” contacts and connecting them by twisting. The connection point must be carefully insulated with dielectric adhesive tape.
If you repair damage to the power cord by twisting the wires together, be sure to wrap open place electrical tape
If the problem is in the button, you need to clean it and tighten the screws securing the terminals. As a last resort, you can temporarily disable the button by connecting the wires directly. In this case, the motor will turn on immediately after connecting the cord to the outlet.
If the hairdryer control button is out of order, the wires can be connected directly before purchasing a new part, however, some modes of the device will stop working.
Fan doesn't work
The most common reason for a fan stopping is hair. During operation, the hair dryer pulls small hairs inside and they are wound around the propeller axis. Over time, the rotation slows down and eventually stops altogether. Obviously, it is better to periodically clean the fan and not let the situation become critical. Moreover, this is easy to do - using tweezers or a small brush to remove hairs from the impeller will not be difficult.
From the outside, you can clean the air intake holes, but in order to get to the fan, you need to disassemble the housing
The criterion for normal fan operation is the free rotation of the propeller on the engine axis.
If the situation repeats frequently, you need to carefully examine reverse side air pipe. The air intake grille may be damaged and too many foreign objects are entering through it. You can get out of this situation by sticking it on the grille mosquito net or gauze, but it must be held firmly so that it does not get sucked inside. Some models have an input air filter. It may be time to clean or replace it.
The filter is located at the back of the hair dryer, on the air intake side
Outgoing air does not heat up
The spiral is one of the most vulnerabilities all hair dryers. Despite the fact that modern heating elements are quite reliable, they are greatly influenced by the good condition of all others. structural elements. It’s good if the device has automatic shutdown of the coil when it overheats. If not, then it can burn out if, for example, the propeller is clogged or the electric motor is faulty. The first sign of excess load on the coil is the characteristic burning smell that occurs when the hair dryer is used.
The smell may persist even after the device is turned off, which indicates the need to check the serviceability of the electric motor.
Another indirect evidence of excessive heating of the coil can be high temperature housings. It shouldn't get hot. An abnormal increase in temperature indicates a malfunction.
When overheated, the heating coil breaks
Repairing the heating element also begins with disassembling the hair dryer. Most often, the gap is visible to the naked eye. If the damage is not total (melting of large areas or breaks in several places), it is not difficult to repair. You just need to connect the ends of the spiral again. It is best, of course, to solder them, but if you don’t have special skills, you can tightly twist them by squeezing the connection with pliers. Because nichrome wire quite thin, when turned on, a microelectric arc is formed at the junction and the ends of the spiral are welded.
It is important not only to restore the integrity of the heater, but also to determine the cause that led to overheating. Otherwise, everything will happen again very soon. If an autopsy shows that the spiral is damaged in several places, it is better to replace it entirely. In this case, you need to select a heating element from the same manufacturer as the hair dryer.
Interestingly, having originated as a hairdressing accessory, the hairdryer soon found application in such industries as construction and electrical soldering. Technical hair dryers used in many processing processes building materials, to speed up the drying and heating process adhesive compositions, heat-shrinkable tubes, etc. Today, even to ignite coals in a barbecue, a special high-temperature hair dryer is used.
Video: disassembling and repairing a Maxwell hair dryer
Problems with the electric motor
The motor is designed to rotate the fan. Usually a good hairdryer has a speed switch, with which you select the optimal air supply mode. Control occurs by changing the current supplied to the motor. For this purpose, there is a electronic circuit, which, by the way, can also fail.
The electric drive of the hair dryer fan ensures its rotation at different speeds depending on the selected operating mode
Characteristic signs of a damaged motor are a crackling sound when turned on and uneven operation. Dry discharges occur due to breakdown of winding insulation. Sometimes you can hear a hum inside the device, but the fan does not rotate. There may be a smell of burnt wiring.
A DC motor has several windings, the breakage of which is the most common cause of its failure.
Repairing an engine at home is quite difficult. This is due to its small size and the need to use special diagnostic devices. If the armature windings are burned out, then you can rewind them only using special devices. It is much easier to simply replace the damaged part. Here you just need to carefully remove the old motor and install a new one in its place.
Video: how to disassemble and repair a Scarlett hair dryer
Control unit problems
The operation of all components inside the hair dryer is interconnected. And the main coordinating link is the electronic control unit. In addition to transforming alternating current into direct current, it changes the operating modes of the motor and regulates the degree of heating of the spiral. The scheme is relatively simple, but only a specialist can understand it professionally.
The electronic circuit is located near the control buttons inside the handle
Due to voltage surges in the network, violation of operating rules, or moisture getting on the electronic board, a disruption in the normal operation of the unit may occur. Visually this is expressed in a change appearance details. Capacitors become deformed and swell. Resistors (resistors) darken and become charred. Connecting tracks on printed circuit board may melt and rupture. If you have spare radio components and soldering equipment, you can replace and restore the operation of the electronics. But you can replace the entire block.
To repair an electronic board, you must have special equipment and qualifications
If we talk about the procedure for diagnosing a broken device, then it should be carried out according to the principle “from simple to complex.” This means that you first need to inspect mechanical part(cord, buttons, impeller). Then - electrically, check the integrity of the connecting wires, contacts and terminals, the operation of the electric motor and the spiral. And finally, carry out an audit of the electronics - the control unit, other systems and interlocks. If inspection of the microcircuit does not give intelligible results, it is checked using a tester.
Video: diagnostics and repair of a hair dryer
How to remove a fan impeller
Often the impeller blades in hair dryers are damaged. This happens gradually as foreign debris accumulates and is drawn in by the air flow through the separator. One day the amount of foreign interference exceeds a critical state and the blades crack. This happens when the device is turned on, when the motor picks up speed and the rotational force becomes maximum.
As debris and dust accumulate inside the hair dryer, the fan blades experience increasing resistance when rotating and finally break.
The first sign of a broken impeller is vibration. In addition, you can hear fragments of plastic cracking inside the case. If this happens, the impeller must be replaced. Needs to be removed protective cover, carefully inspect the device for attaching the propeller to the motor. The connections are different for different models. But the principle, as a rule, is the same - the impeller axis is pressed onto the electric motor drive. In most cases, it is easy to remove by carefully prying it off with a screwdriver. Sometimes this requires removing the motor and propeller from the housing and then disconnecting the blades.
All renovation work are carried out only when the power to household appliances is turned off. This is the best guarantee of safety. If the hairdryer is on warranty service, it is more expedient to solve all current problems in specialized organizations. DIY repair and improper use will void the manufacturer's warranty. Before using the device, it would be a good idea to carefully read the manufacturer’s recommendations.
When your fiancée's hair dryer stops working, it can turn into a tragedy...
Of course, you can please your beloved by purchasing a new one, but believe me, if you undertake to repair the old one and succeed, you will not only save your household budget, but also increase your status as an owner, husband and jack of all trades!
Of course, for many, repairing such devices will not cause any particular difficulties due to own experience and knowledge, but not everyone is such a master fixer!)
Now, using a live example, let's look at some typical faults this type of technology, and those who have never encountered such work will see that there is nothing overly complicated about it. Of course, there will be differences in different devices, but the principle is the same.
The first thing you should pay attention to is the power cord; often the wire breaks either at the base of the power plug or at the hair dryer handle itself. Moreover, a broken wire may visually appear to be in good condition because it is covered with rather thick insulation on top.
Such a malfunction is often detected by the fact that by bending the wire in the above places the device can work. But make no mistake, you cannot operate electrical appliances with such a wire; the wire must be replaced.
To do this, you will have to disassemble the hair dryer, but this will also be needed to troubleshoot other problems. Let's get started.
How to disassemble a hair dryer
As a rule, all modern hair dryers, as well as other household devices of this kind, do not always have fastening bolts that are accessible and visible; they are often hidden behind various plugs or plastic panels which need to be unfastened. The patient for this article, an old Rowenta hair dryer, is no different in this sense.
Unclip and remove the plastic panel on the hair dryer handle
Using a thin flat screwdriver or better yet a short mounting knife, press the latches and remove the cover. Next you need to disassemble the mechanism for switching the speed mode. To do this, remove the switch wheel axis and remove the bar.
Then we remove another cover and only now can we unscrew the fastening bolts.
By the way, for this you often need a cunning screwdriver, such as a triangle, an asterisk, or a flat one with a slot; in my case, this is a homemade product made a long time ago from an old one. flat screwdriver, but now you can buy them.
Now that the two screws are unscrewed, complete disassembly It is necessary to remove another plastic part of the case.
Well, we got to the insides. Now, you can replace the wire and perform any other repairs.
What was the cause of the malfunction
In my case, the heater shutdown button was broken. Do you know what this button is for? Many, as it turned out, are not aware. The fact is that if you turn off the hair dryer immediately, without using this button, then there is a risk of damaging the device. This can happen because the fan immediately stops after turning off, and the coil has not yet cooled down, the heat has nowhere to go, the hair dryer overheats, and you can even melt the body. And this button allows you to turn off and blow through the coil while the fan is running, giving it the opportunity to cool down somewhat.
So this very button failed, the fastening of one of the contacts broke, so the hair dryer only blew cold air. To repair it, I had to slightly widen the hole of the torn contact and, putting it in place, melt it with plastic to fix it. Of course, before this it would be correct to clean the burnt contacts.
In general, after these simple steps (it takes much longer to describe than to do), the hair dryer worked properly.
What other problems can you fix yourself?
Check the integrity of the power cord, plug, quality of connections, soldering. The button itself can also, if necessary, be disassembled for cleaning, but this must be done carefully so that the contacts and spring do not jump out (used in some buttons). If the button is seriously malfunctioning, it will already have to be replaced; this may not be possible due to the fact that it just can't be found.
The fan motor and the spiral itself are also poorly repairable - if they malfunction, either professional intervention is required, or...... Long live the store!
One more possible malfunction repairable - thermal fuse.
This is a self-resetting fuse that turns off the heater coil when overheated, and after cooling it returns to its original, closed position. But it happens that its contacts burn out over time and it stops working normally. You need to restore good contact, carefully use something thin (a nail file works great while your wife can’t see) and shuffle between the contacts, but do not loosen them more than the thickness of the file. Otherwise, you will then have to bend the contact plates to compress them well.
Sometimes tucking is simply necessary. But be careful, it’s not that simple, remember that everything is attached to a fragile mica base and putting in effort can only make things worse.
Remember that with any repair, care and accuracy are important! This is one of the keys to success!
