How to repair a household fan. DIY floor fan repair
When producing cheap models, the manufacturer saves on the quality of materials, so they break more often than their more expensive counterparts. If the fan stops working, then do not rush to throw it away, because restoring its functionality in most cases will not require much time and financial costs.
I won't dwell on mechanical failures. such as repair of the impeller, housing, turning mechanism, etc. To eliminate these breakdowns, you simply need to restore the worn or broken part or replace it with a new one. This article will discuss issues related to repairing the electrical part of the fan, in which the electric motor does not turn on or operates with a hum, unpleasant burning odors, or jamming. A more complex floor model will be taken for consideration. Built-in exhaust fans are much simpler in design, due to the absence of a speed switching unit, so they are even easier to repair. But repairs, given the price of a simple model exhaust fan without bells and whistles it is impractical.
For that to find the reason If the fan is malfunctioning, it will need to be disassembled. Doing this yourself will be quite simple and quick. First remove the protective grille, then the fan blades or impeller, which is secured with a nut. Next, you need to remove the second part of the protective grille and unscrew the screws of the cover.
Troubleshooting when repairing a household fan
Before you start repairs you need to study with your own hands schematic diagram device operation. 
As a rule, an asynchronous electric motor is installed in a floor fan, consisting of eight windings (working and starting). A 90 degree phase shift is required for successful launch. For these purposes, a capacitor is installed. The device starts to work after pressing the power button, after which the indication light lights up and the motor starts, the rotation speed of which depends on the winding switching circuit, for which a 3-speed switch with a mechanical locking of the simultaneous activation of several buttons is responsible, which may cause short circuits.
Before you start checking the motor:
- Straightaway it is necessary to check the serviceability of the cord connections to electrical outlet. To do this, you must first disassemble the switch block, and then, in compliance with electrical safety measures, use a multimeter to check the presence of 220 Volts at the contacts of the light bulb.
- Check the condition of the capacitor By .
- Ring for integrity and check the reliability of all wire contacts and connections in the circuit.
- If you hear a hum when the fan is running or noise, then lubricate the plastic parts inside the gearbox with Lithol or Solidol through the holes that are specially provided for this purpose.
- Check availability of 220 Volts at the output with the switch button turned on.
Fan motor repair
You need to start repairing the electric motor yourself by lubricating the bearings, very often after this the fan begins to work normally. The motor shaft rotates in plastic bushings. 
Machine oil is suitable for lubrication - drop a couple of drops of oil at an angle so that it flows into the inside of the bushing, and then rotate the shaft back and forth along the axis until it begins to rotate easily.
Possibility of rotor failure engine is relatively small and in my repair practice household appliances I haven’t encountered it yet, because EMF is induced in the rotor (current arises) under the influence of the stator windings.
Often in electric motors household fans there is a break in one of the stator windings. If even one winding is broken, then the engine will not work at all. To check, simply turn the blades sharply clockwise. Just immediately quickly remove your hand from the blades to avoid injury. If after this the floor fan starts working, it means one of the windings has burned out. Please note that if the winding connected to the capacitor breaks, the fan will not work in any case. To determine the integrity of all windings, I recommend testing them with a multimeter. Please note that the winding resistance should not be too high or zero.
Very important Before disconnecting the wires from the windings, do not confuse them when connecting them, so before removing the wires, apply distinctive markings on them if they are the same color. Before removing wires or starting to disassemble any devices with my own hands, I always take photographs of all stages. If you then have questions or doubts during assembly, then photographs are a great help.
If the stator winding is broken or burnt out Considering the price of a floor or built-in fan, I do not recommend rewinding or repairing the winding. In this case, it is more advisable to buy a new model.
The service life of the fan motor is reduced several times, if you do not periodically clean it from dust and dirt, and also if you do not lubricate the bearings or gearbox.
Related materials:
Victoria:
Hello. Help me please. The floor fan broke, and I, pregnant, am dying from the heat. It worked, and then it just started humming and the impeller wouldn't spin. What to do?
Yuri:
It's a shame! I didn't do anything... I read the instructions, dripped some oil and the fan started working like new. Thank you!
Andrey:
Good day! I read the entire thread and to be honest, I saw only one similarity with my problem, but I’m not completely sure.
So there was a fan, an ordinary kEtai. I bought it when I was in Bulgaria, brought it home. It worked... Then it stopped starting, it hummed when turned on and started only with the pusher. It spun and then began to stop sometimes. It helped to stop again with the pusher, but with turning on overdrive) 2 or 3. Then I disassembled it, washed it and lubricated it. It started working without a pusher, but with a loss of power in all modes. At speed 3 it works like at speed 1 approximately.
I have two options. Either a capacitor or one winding. I haven’t figured out how to ring it yet. Thanks in advanceMarseilles:
Hello! I have this problem, the fan was spinning, then I turned it off, moved it to another room, after a couple of hours I turn it on, and suddenly it spins slowly, after a couple of minutes it stopped spinning altogether, the motor inside works, but the fan itself does not spin. What could be wrong? problem? What do you recommend?
Anonymous:
Hello! I have this problem. Vitek floor fan, when turned on, two indicators on/speed and mode light up simultaneously. And the fan turns off. Please tell me what could be the problem.
Victor:
Good afternoon Very good, solid article) The essence of my not simple problem is this: the children knocked over the fan, thereby damaging the motor windings with the rotor. Result: multiple breaks in the windings. Due to a limited budget and sporting interest, I want to rewind the engine. At least even at one speed. Do you have any useful articles at your disposal?
Conventional floor fan Chinese delfa 40W. Motor with 8 windings, three speeds. What surprised me: the winding wire is aluminum. I myself am a winder of transformers, but I have no experience with motors. Please help. Thank you in advance!Victor:
I’m also interested in whether there is anywhere approximate data on the number of turns of windings (maybe you’ve seen it?). Otherwise, it is no longer possible to count by eye.
Ilya:
Hello, I bought a fan, assembled it at home and turned it on, it seemed to me that it was working quite noisier than the one that was on the sample in the store and I noticed that the motor shaft (to which the blades are screwed) gets very hot, after about half an hour of operation the shaft becomes very hot, It’s impossible to say that it’s really hot outside and at home. Is this normal or should this iron pin not get hot at all?
Experienced Electrician:
Hello, the engine is noisy but does not turn over.
Typically, fans are used for long periods of time without interruption. As a result, certain problems arise. Breakdowns can be small or large. In this case, you need to know how to do an initial examination. After this, you can think about how to repair the fan. However, first of all you need to familiarize yourself with the structure of a conventional floor-standing model.
Fan device
The cooling process itself is carried out due to the rotation of the blades. They are mounted on a special shaft. In this case, it is driven by a motor. Electric motors of different power are used, but their design is quite similar. In turn, control units are very different.
Stators are used to start electric motors. The fan shaft is located on the cranks. The flanges of the models serve as a support for the contact blocks. Additionally, some fans have an element called a gearbox. Sometimes it is installed with a clamping bar to secure it.
Motor repair
The motor in the device often breaks down due to overheating. Repair of the radiator fan in this case must begin with an initial inspection of the model. To do this, you will need to remove the cover that holds the cap in place. Next, remove the protective grille. After this, you need to unscrew the flange. In some models this is not necessary.
In this situation, much depends on the design of the fan. The electric motor is usually fixed in the housing with four bolts. After disconnecting the motor, you need to inspect its contacts. If darkening is visible on them, then the problem clearly lies there. To solve this problem, you will have to purchase a new electric motor and install it in place.
Capacitor problems
Capacitors in devices most often break due to sudden power surges in the network. Repair of the cooling fan in this situation should normally begin with unscrewing the cover. The motor of the device will have to be disconnected first. The condenser is located in many fans behind the central flange. In order to get to it, you will need to completely unscrew the power supply.
In some cases, the crank will also interfere. In this situation, the flange is removed first. The functionality of the capacitor can only be checked using a tester. In this case, the resistance on the conductors is assessed. If the value on the device exceeds 50 Ohms, then the capacitor will have to be replaced.
Checking the stator winding
Problems with the stator winding are considered very serious. Repair of the heater fan in this situation will have to begin with an inspection of the engine itself. If the stator burns out, the capacitor may also fail. If the contacts of the electric motor are not burnt out, then it is intact.
The next step is to check the capacitor directly using a tester. When the stator is faulty, it smokes heavily during operation. It should also be taken into account that this element can heat up quickly. In any case, it will have to be completely changed. To do this, you need to purchase a similar product in the store.
Control unit repair
A variety of control units are installed in fans. Most often, worm gears break in them. In this case, repairing the fan unit should begin by removing the contact block. There is no need to touch the electric motor. It is most often located under the central flange. In some cases, the path to it is blocked by a lining that can be removed. Next, to repair the fan control unit, you will need to completely twist the shaft using a screwdriver.
The next step is to immediately remove the block. To inspect the worm gear, you will have to twist the back cover. Next you will be able to see the contact shaft underneath. It is checked using a tester. The resistance parameter should not exceed 50 Ohms. Otherwise, the control unit cannot be repaired.
Rotor replacement
The rotor breaks in fans quite rarely. One of the reasons for this may be overheating of the electric motor. In such a situation, repairs should begin by disconnecting the cover. The rotor is usually located on a special gasket. Sometimes it may be behind the shaft. In any case, you will have to remove the electric motor using a screwdriver.
Next, you should inspect the wire that comes from the rotor. If the soldering is in order, then it should be carefully disconnected. It is usually secured with two screws. To replace the rotor, you must purchase a similar product. In this case, you can use the old gasket. When securing the electric motor, make sure that it does not come into contact with the rotor.
Diffuser repair
The diffuser is an integral part of the control unit. It usually breaks due to the regulator being twisted. In this case, fan repair should begin by removing the top cover. There is no need to touch the electric motor. However, for convenience, the central flange is easiest to detach immediately. Otherwise, it will be difficult to install the control unit in its original place. After disconnecting the regulator, remove the control unit itself.
The diffuser is located on the back side. In some cases, it is attached to a special clamp. In order to get it, you just need to pry the base of the element with a knife or screwdriver. After this you can inspect it. The diffuser is rarely changed separately. In stores, it is usually sold together with the control unit.
Problems with the blades
Fan blades are always made of plastic. If a foreign object falls behind the mesh during operation of the device, they can be easily damaged. In this case, repairing the fan yourself is very simple. There is no need to remove the back cover of the device. First of all, you should inspect the protective grid clamp itself. It is mainly held in place by a plastic cap. It's quite easy to twist it by hand. After this you will be able to remove
The next step is to remove the pad that holds the blades. This can also be done without using a special tool. If the blades are seriously deformed, it is easier to replace them. If we talk about low friction between the part and the grille, then you can try to fix everything manually. In this regard, the plastic sometimes gives in, and the blade can be installed in its original place without problems.
Flange problems
Flanges, as a rule, are installed in fans made of plastic. If the device falls, they can easily break. In this case, repairing the fan will have to begin by unscrewing the back cover. If we consider simple models, then their flanges are usually located near the electric motor. However, there are modifications where they are located near the shaft itself. In the first case, there is no need to remove the control unit. However, you will have to twist the crank first.
Next it is removed. After this you will need to disconnect the switch. The flange is primarily attached to the panel using screws. If it is severely deformed, then the easiest way to pry it off is with a screwdriver. However, if the damage is not serious, then it can be easily twisted. If we talk about models where the flange is installed near the control unit, then you should do it differently.
First of all, the pressure plate in the fan is released. Next, the control unit itself is twisted. The next step is to remove the gasket, which is located next to the rotor. In this case, the flange must be secured with two screws. To replace it, you will need to order a similar part from the service center.
Crank offset
Crank stickout is usually accompanied by problems with the shaft. In this situation, repairing the fan must begin by removing the cover. Next you will need to work on the stator, which is located next to the electric motor. Sometimes it can be fixed on a special platform. In any case, you need to tighten the nuts with a wrench. Next, the shaft itself will be visible in the fan, under which the crank is located.
If it is deformed, then it needs to be removed first. Cranks are made mainly from stainless steel. A person can straighten them on his own. However, this part is very small in size, and in this situation it is easier to use a vice. If you cannot solve this problem yourself, then you will have to contact a service center.
Speed switch failure
A breakdown of the speed switch is often accompanied by increased noise from the device. In this situation, repairs should begin with an inspection of the regulator. Located this element near the control unit. To get to it, you just need to twist the back protective cover.
After this, it will be possible to remove the contact block that blocks the control unit. in this situation you can not touch it. However, depending on design features model, the repair plan may vary slightly. After removing the control unit, the regulator itself is inspected.
It happens that the problem lies in the disconnection of the conductor. In this case, the problem can be solved with the help of However, the speed switch may also burn out, and then it will have to be replaced. You can order the specified fan component through the service center. There is also always the opportunity to seek help from workshops.
A fan, like any other electrical device, tends to sometimes break down; the stator winding in it most often burns out. But this is not at all a reason to send him into retirement. In this article, we will talk about the practice of repairing household fans.
We begin the disassembly process by removing the fan cover, hidden under it small dimensions single-phase with squirrel-cage rotor, power 20 Watt. Let me remind you that the rotor is a moving part of an electric motor that rotates due to . Thereby driving the blades of our fan.
The stator is a static winding that is located on the steel core of the electric motor. The stator carries out the conversion alternating current into a rotating magnetic field.
Upon external inspection, it is of course difficult to break any device if there are no obvious signs of damage that speak for themselves. In our example, we need to test the stator winding and power cord for integrity. The easiest way to do this is with a regular multimeter, which should be in the tool arsenal of any radio amateur. You can learn how to use a multimeter correctly.
After a series of measurements, it turned out that our power cord was in perfect order, and the stator winding of the household fan simply burned out. To repair it yourself, we will need to partially disassemble the engine. The stator winding can be removed quite easily using a regular screwdriver by driving it in with even blows in the places indicated by the arrows in the photo.
After successfully dismantling the stator winding, you can move on to mathematics, namely, calculating the number of turns for the motor stator winding.
For a simplified calculation, you can use the following algorithm as a basis:
The voltage in a normal alternating current network is 220 Volts, the engine power is 20 Watts, the cross-section of the core is 1.2 cm 2, the current passing through the coil will be 0.09 A. (based on the well-known formula I=P/U).
The cross-section of a typical wire can be calculated using the following formula:
If we convert the area cross section wires from 0.03 mm 2 in diameter of the wire we get in the end: d = 0.19 mm
I borrowed the winding wire from the coil magnetic starter with a diameter of 0.17 mm since I don’t know if I can fit the required number of turns on the coil frame.
IN the latter case:U – mains voltage, S c – core cross-section, B c – magnetic permeability of iron (maximum 14,000 hectares).
As soon as we calculate the number of turns, we can start winding. It is difficult to wind so many turns around the core manually, so I recommend using a homemade one.
After the coil is made, it is necessary to impregnate it with a special impregnation varnish, otherwise the insulation of the wires in it may be damaged.
After the varnish has dried, you need to install the coil back. If, after assembly and testing, problems arise with the direction of rotation of the blades, then you only need to remove the rotor and install it on the other end of the core. Alternatively, you can pull out the stator coil again, rotate it 180 degrees and install it back.
In the figure above, short-circuited turns are marked with red arrows; the magnetic field rotating the blades, which acts on the rotor, will be concentrated on them.
In order to find the cause of the fan failure, it is necessary to disassemble it, as in the previous example. This is quite easy to do. First, we remove the protective grille, then take out the blades or impeller, which is usually secured with a special nut. Then you need to dismantle the other part of the protective grille and unscrew the cover screws.
I also recommend studying the typical circuit diagram of a floor fan. Typically, it uses an asynchronous electric motor with 8 windings (working and starting). To successfully start the engine, it is necessary to create a phase shift of 90 degrees. For this purpose, the circuit contains a capacitor. The circuit will work after pressing the power button, the indicator lamp should light up and the blades begin to rotate, the motor rotation speed depends on the connection diagram of the windings, using a switch.
First you need to check the serviceability of the network cable. Then execute to start the engine. It is also recommended to check the integrity of the contacts and wires. If a hum or noise is heard while the fan is operating, then you need to lubricate it with Litol thick lubricant.
Electric motor repair begins with lubrication of the bearings, usually after this the fan begins to work well. Machine oil can be used for lubrication.
A fairly typical malfunction is a break in one of the stator windings. To check, you can sharply rotate the blades in the direction of rotation clockwise. If the fan starts working, it means one of the windings has burned out.
The service life of the electric motor is reduced several times if you do not clean it of dust, or if you forget to lubricate the bearings or gearbox.
Air circulation is very important, so the combination of a ceiling chandelier with a fan creates optimal working conditions. Such lighting devices can provide an influx of fresh air in any season. Reviews of these models indicate that the rotation of its elements does not lower the temperature in the room.
There are different prices for lighting fixtures with a fan:
- in a low price category that can be bought inexpensively;
- at an average price, based on the family budget, select the appropriate quality;
- There are luxury models, their price is quite high.
If someone has wondered how to connect a chandelier with a fan independently in a three-phase network, then here you can find information on this issue.
Before you start connecting a chandelier with a fan, it is important to decide on its location so that the light falls evenly without disturbing the overall mood of the room. If you plan to connect it in place of the previous chandelier, then you can skip this point.
Next, define approximate weight chandelier and if you find that it weighs more than 13-15 kg, you need to install a beam that will help hold the chandelier. If you skip this step, you may damage the wires or the surface of the ceiling. IN ordinary apartments It is unlikely that you will find such a heavy chandelier, so, most likely, you can do without installing an auxiliary beam.
Installation of distribution box
Before you start connecting the chandelier with a fan, you need to connect the junction box to the power cable. This must be done carefully and carefully, following all safety regulations.
The heart of the structure, that is, the electrical circuit, must be connected at a distance of a little more than 10 cm with the installed box; a supply of wires after connecting the cable is necessary in case of damage to the wires. Then you need to cover all the wires with a special cover. All wires must be insulated and the box must be tightly bolted.
There are already many reviews that are full of pleasant words in favor of similar design. This is not surprising, because buying such a lamp means giving yourself a soft, pleasant coolness along with gentle lighting. Air conditioners consume a large amount of electricity, which cannot be said about ceiling chandeliers-fans, which can be bought in a specialized store. For example, you can find a high-quality, sophisticated and functional model at Leroy Merlin.
Moscow stores have established themselves as reliable suppliers of high-quality designs, where you can easily find a wide variety of lighting fixtures and inexpensively. A photo of a chandelier with a fan will help you get to know the design better. In addition, the photos that are in this article can be an excellent assistant in choosing a chandelier suitable for combating stuffy and stagnant air in the room. The price of a chandelier with a fan is low compared to an air conditioner, and it is still more profitable to purchase such a design than an air conditioner and a chandelier separately.
During the hot season, a large ceiling fan performs better than other fan models in normalizing the microclimate in the room. The air flow from it covers a significant area. And even at low speeds, the effect is very pleasant for residents. The fact that the fan occupies a central place on the ceiling, which is usually used for a chandelier, does not cause problems, since in some models the functions of the fan and chandelier are combined.
But attaching a regular chandelier to the ceiling and a combined model are somewhat different. For an ordinary chandelier, a hook is sufficient, which is provided in any room. It is motionless and other than gravity, no other forces act on it. And when the impeller rotates, a torque arises. It is directed in the direction opposite to rotation. And this feature should be taken into account by the suspension ceiling fan any design, especially combined with a chandelier. In the absence of rigid fastening, axial movements will appear when the impeller rotates.
For high ceilings
A simple ceiling fan is not noticeable during these movements. But the movement of light bulbs in a chandelier with a fan will create an unpleasant lighting effect in the room. Light and especially shadows will begin to move. If the ceilings in the room are high, suspended ceilings are usually installed. The base of an ordinary chandelier is made at the level of the suspended ceiling and suspended on a chain or cable. These extension cords cannot be used for a chandelier with a fan. In this case, the best extension cord would be metal pipe. Its diameter should be such that it fits onto the ceiling hook with two holes made near its end. These hook holes should be diametrically opposed.
The pipe is also convenient for placing wires inside it. Although the wires are connected as if to one device, they actually create two separately operating circuits. After all, during the day when the impeller rotates, lamp light is not needed. Therefore, to control lamps in the simplest circuit, you will need the same thing as for a chandelier. And the fan has its own separate circuit. It allows you to adjust the speed of the impeller. The connection diagram of the simplest model is shown in the image below. It has one lamp and one impeller rotation speed. Therefore, to control such a chandelier-fan, a switch with two keys is enough.
Variety of models
The number of lamps can be three, five, and sometimes more. The impeller speed can be divided into two or three stages and can even be adjusted smoothly. You can also smoothly regulate the light of lamps using dimmers. There are many models of such combined structures produced and it is unlikely that they can be standardized with just a few schemes. In order not to experience problems with installing the connection diagram for such a chandelier, when purchasing, you need to make sure that the accompanying documentation is available and everything is clearly stated in it regarding connecting the product to the electrical network.
If the connection diagram for a chandelier with a fan turns out to be too complicated to assemble it with your own hands, there will probably be specialists who will do everything necessary. When the selected model contains lighting control sensors or impeller rotation speed, there is a separate control unit, the programming option is better to immediately resolve the issue upon purchase by calling a specialist to connect such a chandelier with a fan. With your own hands complex circuit You can not only fail to assemble, but also damage something.
