The engine on the fan is buzzing but does not spin. The power supply fan does not work
Household fan does not differ in the complexity of the design, and the principle of its device can be seen in the figure below.
If you carefully look at the drawing, it becomes clear that an electric motor, a gearbox, a crook, a rotation speed switch and a propeller that creates an air flow can fail in the device.
The main difference between the desktop cooler and the floor is a high stand in the floor version. The rest of the design is identical.
So, the main malfunctions that you can observe from the cooler you purchased:
- The unit does not turn on, the network light does not burn;
- The device does not work, but the light is burning;
- Coler’s blades rotate poorly;
- The unit does not turn to the sides;
- the cooler makes a buzz and does not rotate.
To identify the root cause of the malfunction, you need to find out what parts the fan consists. Regardless of the type (floor or desktop), the device has exactly the same device. The difference is only in the length of the rack.
The problems of the fan are different, and each of them has its own reasons and signs.
The fan does not turn on
The device may not turn on, but in this case it is important to pay attention, the light bulb or not when trying to launch the device lights up. If the indicator glows, and the device does not turn on, then the block with the buttons, which is located on the fan stance, broke.
If the bulb does not turn on on the case, and the device does not make sounds, perhaps there is no voltage in the outlet, or the reason lies in the breakdown of the cord, fork. If it is impossible to launch a household appliance and the exclusion of the above reasons, the problem should be sought in the electric motor.
The blades rotate poorly
Blades can slowly rotate for several reasons. The main of them is the lack of lubricants in the sliding bearings. Sometimes the blades are deformed at high temperatures from the engine (when the device has been operating for too long, overheating occurs). In this case, the blades cling to a protective grid, so finding such a problem is simple and fast.
The fan does not turn to the sides
Most likely, his fasteners weakened, and you just need to tighten them. If the unit turns, but with a creak, that is, tight and with pauses, disassemble the fan housing and check the condition and adhesion of the gears in the gearbox. Make sure the switch moves freely up and down. It will be necessary to remove the shaft and the main gear in order to grease them. Collect everything lubricated back. With the wear of the gears, collect a fan without a gearbox. it will work in a static position. But it will be.
The cooler is buzzing and does not rotate
Many people mistakenly call the cooler a fan, but in reality it is a cooling device that may not have blades. The main purpose of the cooler is to remove the heated air from the fan. Sometimes he buzzes, but does not rotate. There are several reasons:
The fan makes noise and creaks
The case is the deformation of the propeller or the weakening of the sliding bearing fastener.
Remember, maybe you pulled it out in the sun and forgot it there or even dropped a lot and strongly. Disconnect the device from the network and begin to disassemble it. Inspect the protective grate for deformation. perhaps the blades during rotation relate to its pressed parts. You can straighten all bends with your hands. Remove the propeller, inspect it and its blades. the topic is the same. Unlike the grille, straighten the polyurethane with your hands. We’ll have to change the propeller. If everything is exactly there, check the bearing fastener. tighten all the bolts.
Despite some external differences in various models of fans, the principles of their device and repair are the same. Do not be sad if your fan breaks, do not rush to carry it to a landfill and look for a grandmother’s sink in the attic. everything is not so difficult and most often corrective.
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What else can happen to the floor and desktop fan:
- Capacitor breakdown. In household fans, a dry type made of plastic is usually used, which is easily deformed due to overheating.
- Electric engine malfunction. The main feature is that the device does not start or gives unnatural sounds.
- Problems in the control unit. Most often the reason lies in worm gear and diffuser.
- If there is a speed switch, then the fan may not work due to its malfunction. The reason is a break in windings.
- Rarely failure of the fan is the rotor. This happens against the background of overheating of the motor.
Regardless of the cause of the malfunction of the floor and desktop fan, conduct an independent diagnosis, which will reveal the site and cause of the broken.
Do.it.yourself floor and desktop fan repair
After detecting a problem with the fan, you can proceed directly to the repair. First prepare the necessary tools and materials depending on the type of malfunction. The first thing that is checked after the diagnosis of the cord, forks and sockets is the serviceability of the electric motor. Often the problem is the microcircuit, so first determine the level of flow rate on the fee and the output from the chip. In the absence of voltage, the problem lies in the breakdown of the microcircuit, which can be replaced.
If the current goes to the microcircuit, and the floor or desktop fan does not turn on, you will have to disassemble the case and check whether the current comes inside. If not, the problem is the electric motor, so you have to give the motor for repair.
- Disconnect the two wires connecting the electric power and the microcircuit;
- also do with 2 wires going from board to the motor;
- Assume a new microcircuit.
There is an option in which the fan will work without a microcircuit, that is, directly, so the device will be included immediately after installing the cord in the outlet. To do this, do similar actions with wires, but instead of installing the microcircuit, they are connected to each other.
To understand how to make a fan repair yourself, you need to know the principle of operation of the device. Scheme:
- asynchronous type, installed on standard floor and desktop fans, has 8 launch and working windings;
- To launch the phase is shifted by 90 degrees using the capacitor;
- The launch is carried out after pressing the power button (first the red indicator turns on, after the electric motor begins to rotate);
- The speed of the rotational moment is affected by a 3-speed switch that has mechanical locks of simultaneous speed switching.
Replacement of the rotor
The rotor is usually on the gasket under the lid or behind the shaft, so the engine is removed for its repair or replacement with screwdrivers. The first thing to do is to inspect the wiring that can be the cause of the malfunction. If there are no defects on it, you will have to change the rotor, since it is not possible to repair it yourself. Be sure to write down the number of the device and purchase exactly the same model.
- Disconnect the wire leading to the rotor;
- unscrew the screws;
- Remove the device;
- Put a new rotor, tightly screwed to the base.
If the gasket is not deformed, it is pointless to replace it with a new option. use the old element. Keep in mind that the rotor should not touch the electric motor.
How to fix a control unit?
The control unit breaks due to worm gear. This problem can be eliminated independently by following the instructions:
- Remove the contact block (the motor does not need to be removed);
- If there are gaskets for the managerial unit, remove them;
- twist the shaft with a screwdriver;
- remove the control unit;
- dismantle the lid behind, opening access to worm gear;
- To check the performance, use the tester (without breakdown, the resistance parameters should not exceed 50 Ohms);
- In case of violations, replace the old element with a new.
What to do if the flange broke?
In floor and desktop fans, plastic flanges are used, which are easily damaged, especially when the device falls. Therefore, replacement is required. How to do it:
- unscrew the rear cover near the motor or shaft depending on the model;
- Remove the crank;
- Disconnect the worm gear without removing the control unit;
- Remove the switch;
- Twist the screws from the flange and disconnect it;
- In the reverse order, install the new flange.
If the model involves the location of the flange near the managerial unit, then first release the clamping bar, then twist the control unit, remove the gasket located near the rotor.
Fixing of the diffuser
Diffuser is in the control unit. The reason for its breakdown is to twist the regulator. Change it as follows:
- Remove the top cover without touching the engine;
- Disconnect the central flange;
- remove the control unit;
- Remove the diffuser from the rear (Put the base with a screwdriver or knife);
- Replace the new element.
It is problematic to buy a diffuser separately in stores, as it is equipped with a control unit, so in this case the entire block is most often changed.
If a part with a propeller and blades is broken, use the following tips:
- With the usual deformation of the impeller against the background of overheating, it is necessary to extract the propeller, slightly warm the blades and leve so that they do not touch the protective grid of the fan.
- If the blades are broken, you will have to buy a new propeller and install it yourself.
- If a small part of the cooler is torn off, the fragments can be glued with reliable glue.
How to repair a capacitor?
The capacitor usually breaks due to unexpected voltage drops in the electric network. The part is located behind the central flange. The cause of the malfunction is the absence of a phase shift or a power to receive a winding. The main feature is no rotation. The capacitor malfunction is checked using a multimeter (measurement mode. resistance).
Problems with blades
Since plastic is used in the manufacture of blades, this part of the fan is very susceptible to external mechanical influences. As a result, the blades are often deformed and broken if any extraneous items fall behind the grid. In this case, to fix the fan, the owner needs to dismantle the protective net. The back cover can stay in its place. There is no need to shoot it. The protective grid is held by a special clamp in the form of a plastic cap. It is easy to turn it with your hands. After the clamp is twisted and the protective grid is removed, a special lining is disconnected that fixes the blades. This stage of work can be performed without the use of tools. Blades are subject to replacement if they are very deformed. If during the operation of the fan there is a slight friction about the protective grill, then they are easily aligned with their hands. According to fan owners, plastic blades bend very easily.
Cooler’s blades are poorly rotated
In the case when the fan does not pull and poorly drives the air, you will need to disassemble the case in which the motor is located. Sometimes the fact that the propeller does not spin can signal the lubrication insufficiency in the sliding bearing installed in the electric motor.
Dismantling the fan is as follows.
- First you need to unscrew the protective grid (its front part) and remove it.
- After the grid, disconnect the propeller. He can be screwed to the shaft of the motor with a nut with left thread. That is, to unscrew the nut, rotate it clockwise, and for its twisting it is counterclockwise.
- Remove the rear protective net by unscrewing another nut.
How to disassemble the fan. instructions with a photo
How to get to the bushings without removing the engine? To get started, unscrew the central screw on the back wall of the protective casing.
Another self-tapping screw is hidden in the adjustment button for turning or stopping at the fan head.
After that, the back cover is easily removed from its place. What is under it? Here you can see the gearbox of the rotary mechanism that gives rotation to the whole head.
A special thrust is suitable for him from below.
The starting condenser of the engine is fixed on top.
By the way, keep in mind that in different models it may not be there. In this case, look for it near the speed buttons.
To access the engine bearing, you will need to remove the gearbox. It is attached on three screws, and properly propped up with a traction.
Twist the screws and disconnect the thrust. After that, the gearbox is removed from the shaft and you get access to the rear hub.
You don’t need to unwind anything else and disassemble. The rest will be made for you.
Put a narrow guide tube on the WD40 spray and several times pash in the gap between the shaft and the bearing.
After spraying WD40, turn the shaft with your hand in different directions and move it a little forward and forth.
Excess thickened lubricant, extraneous garbage and dust will gradually go outside. These excess dirt are easily removed with cotton sticks.
If you have a thick lubricant of the type of Cyatim or Litol, it is advisable to apply it to the gearbox worm. After these cleaning procedures, drip on the bearing on the outside a few drops of oil for sewing machines.
Just do not need to apply it through the chur a lot. Otherwise, it subsequently spreads in all places and dust sticks on it, turning back into dirt. As a result, you will again receive a wedge and a problem with fan rotation.
Near bushings in separate models put felt washers. They are impregnated with oil and when heated, the oil flows into the shaft, lubricating it.
All in the reverse sequence. Traction. three gearbox screws. external cover.
By the way, if through the chur tighten the central self.tapping screw on the back cover, and this is exactly the screw, not the screw, it can pass through the plastic of the rotary gearbox and rest in the shaft.
You will again have problems with turnover and jamming. Sometimes the reason for the breakdown is banal and unpredictable.
I figured out the rear bearing, then go to the front of the fan. Here in the center there is a protective cap.
It turns off, attention. clockwise, since the thread is left.
Throw it away and remove the propeller from the shaft. You get access to the front handle bearing.
The principle here is the same. First, squeeze out and soften the old grease and dirt with a vaeshka, and then apply a new one.
After that, put the propeller back and close the lid. After completing the repair, turn on the fan at high speeds, and letting it work for several minutes, switch to the speed that is required.
Methods for determining the malfunction of the hood
Checking the work of the hood with fire with suspicions of the malfunction should be checked by traction. It is easy to do it yourself. The algorithm of actions:
- Open the window (window sash 6-9 cm).
- Place a lit match in front of the ventilation grille (use lighters, candles). Distance from flame to extract 1 cm.
- Determine which way the flame is in. to ventilation or in the room. In the first case, the system works properly, in the second. the hood in the apartment does not work, you need to take measures to restore traction.
If an experiment with a flame does not give specific results, you can use another method of checking using paper. Without closing the window, you need to bring a dense napkin (its size is equal to the area of the ventilation channel) to the lattice, press it and pull your hand. If the napkin holds hard, the thrust is present, the ventilation is in good. The fall of the paper indicates the opposite. Checking hoods in residential premises is recommended to be carried out at least once a year.
Closing windings or wiring
If the damage is more complex and simple lubrication does not help, you will have to disassemble the fan in more detail.
First you do all the fraud on disassembly as indicated above. After removing the propeller, unscrew the plastic front counter.gaming, which is located immediately behind him, and throw off the entire protective frame.
In your hands you have the engine itself and the leg in which the power wires pass and the button mechanism is located.
Distribution of this leg, having unscrewed 6 screws.
First of all, check the rations of the wires. It is possible one of them, or even somewhat fell off or burned out.
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If everything is intact, how to understand which wire goes where and what is responsible for? Start checking with two wires from a fork for a power plug.
One of them, let it be black (as in the photo below), through the lighting light goes directly to the fan engine.
The second wire enters the lower terminal of the outline switch (button 0).
Further, by pressing the corresponding buttons-1st speed, 2nd, 3rd, certain contacts of the switch are closed, and thereby the engine speed changes.
Each wire from these buttons goes to its conclusion on the winding, with a larger or smaller number of turns. Giving tension to them, you make the propeller spin faster or slower.
Ventilation malfunctions in apartments
Extensive built.in fans are much easier in constructive terms. But their cost is small and often easier to acquire a new one than to look for details that disappeared from the turnover. Poor ventilation of the premises may not be associated with the operation of the device itself, but with errors when organizing an extract system.
With non.working ventilation in the bathroom, the air becomes wet and does not ventilate, linen dries poorly, mold may appear.
- The ventilation hole is clogged with dust and web;
- extraneous objects in the mine;
- exhaust fan is installed for air retraction instead of the removal.
The right option for solving the problem would be an appeal to the management company. Experts lower the load to the ventilation shaft to the very apartment to break through all the obstacles. In particularly neglected cases, the camera is lowered into the mine to determine the location of obstacles. The ventilation shaft is opened from the entrance. You may have to go around the riser’s neighbors and check if they have incorrectly installed fans that violate the hood.
Advice! For the bathroom, an exhaust fan with a check valve is suitable, preventing air flows from the ventilation shaft.
Hood in the kitchen
Exhaust ventilation is designed to remove unpleasant odors and stale air from the apartment. However, in case of violation of construction technology or due to other reasons, the air begins to enter the apartment from the exhaust opening, despite the working fan.
Because of this, extraneous smells arise in the apartment. Cooking products are not excreted from the kitchen. The reasons may be as follows:
- defects in the design of ventilation shafts and channels create reverse traction;
- Strong gusts of wind in one direction blow air flows into the mine;
- accumulations of steam mass and frosty air in ventilation;
- mine pollution by snow and waste.
As a result, the axial fan pulls the air masses from one mine to another and the hood begins to work silently in the opposite direction.
To solve shortcomings, it is better to invite specialists. They will evaluate the rationality of the use of equipment in accordance with the documentation and conduct a qualitative examination of the installation and operation of the ventilation system. The received report will indicate all the shortcomings of the existing system and measures to correct them. Criminal Code employees are required to clean ventilation shafts from foreign facilities. Also, a deflector for sucking smoke and creating through air flows is installed in the exhaust traction effect in the hood.