The fan stopped spinning in different directions

The motor on the fan hums, but does not rotate. The fan in the power supply is not working

Household fan is not difficult to design, and the principle of its construction can be seen in the figure below.

If you look closely at the figure, it becomes clear that to break down in the machine can electric motor, gearbox, crank, speed switch and propeller that creates the air flow.

The main difference between the desk cooler and the floor cooler is the high stand in the floor version. Otherwise, the designs are identical.

So, the main malfunctions that you can observe in the cooler you purchased:

  • the unit does not turn on, the mains light is not lit;
  • the machine does not work, but the light is on;
  • The blades of the cooler do not rotate properly;
  • The unit will not turn sideways;
  • the cooler emits a humming noise and does not rotate.

Diagnosing the problem

Troubleshooting floor and table fans are of 2 types. mechanical and electrical. It is to the first that the average man does not pay much attention, but this leads to a breakdown in the electrical part of the device. For example, if the shaft is jammed and the equipment continues to run, it will undoubtedly cause overheating of the electric motor. If the bearing is loose, the stator winding will be damaged in the future.

Before diagnosing the fan at home, disconnect the unit from the power supply. The unit often fails to turn on due to a faulty cord or socket, so first connect any other appliance to the power supply. If it does not turn on, then the culprit is the socket, which must be repaired.

To inspect the internal equipment of the fan, disassemble it, acting according to the following diagram:

Since failure is often due to lack of lubrication, be sure to drop a few drops of industrial oil on the bushing.

Turn the shaft first to one side and then to the other to allow the lubricant to soak in. After that, reassemble the fan in the reverse direction, turn on the device and check for proper operation.

For a more detailed explanation of how to disassemble the fan and diagnose problems, see this

Mechanical Failures

To detect malfunctions of the mechanical part of the fan unit, pay attention to such manifestations:

  • Unusual noises (noises, whistles, squeaks, etc) and. п.);
  • slow rotation speed of the blades during operation;
  • Difficulties with rotation of the propeller when the fan is off.

Electrical problems

If an electrical problem occurs, it can be manifested in the following ways

  • smell of burning;
  • Inability to start the unit;
  • Slowing down the speed of the propeller mechanism when the appliance is on;
  • Tripping of circuit breakers (if provided).

Faulty ventilation in apartments

Exhaust recessed fans are much simpler structurally. But their cost is low and it is often easier to buy a new one than to look for parts that have disappeared from circulation. Poor ventilation of the premises may be due not to the work of the device itself, but to errors in the organization of the extraction system.

Ventilation in the bathroom

If the ventilation does not work, the air in the bathroom becomes humid and unventilated, the laundry dries badly, mold can appear.

different, directions

The normal scheme of operation of ventilation

different, directions
  • The ventilation duct is clogged with dust and cobwebs;
  • Foreign objects in the shaft;
  • The extractor fan is set to draw air in instead of out.

How To Repair Stand Fan or Table Fan (( fan won’t Spin or Rotate ))

The right way to solve the problem is to contact the management company. Specialists lower a load into the ventilation shaft to the apartment to break through all obstacles. In severe cases, in the mine shaft lowered a camera to locate obstacles. The ventilation shaft is opened from the side of the entrance. You may need to bypass the neighbors in the riser pipe and check to see if they have not properly installed fans that interfere with ventilation.

Tip! For the bathroom is suitable exhaust fan with a check valve, preventing the flow of air from the ventilation shaft.

Kitchen hood

Exhaust ventilation is designed to remove unpleasant odors and stale air from the apartment. However, in case of violation of construction technology or other reasons air starts to get into the apartment from the exhaust vent, even if the ventilator is working.

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The ventilation shaft is clogged

Unusual smells and odors in the apartment. Cooking products don’t leave the kitchen. Causes may include the following:

  • Defects in the design of ventilation shafts and ducts create a reverse draft;
  • Strong gusts of wind in one direction blowing air currents into the shaft;
  • accumulation of steam masses and frosty air in the ventilation;
  • The snow and debris in the sump.
different, directions

As a result, the axial fan pulls the air masses from one shaft to another and the hood starts working silently in the opposite direction.

It is better to invite specialists to solve problems. They will assess the rational use of equipment in accordance with the documentation and carry out quality examination of the installation and operation of the ventilation system. The report you receive shows you what can’t be done with the existing system and what to do about it. FM workers are obliged to clean ventilation shafts from foreign objects. Also get rid of the effect of reverse thrust in the hood install deflector for smoke suction and create a squirting airflow in the kitchen.

Why does the fan not work

There are 5 main reasons for floor fans failure:

  • old dried up grease or lack of it
  • dried out condenser
  • blown thermal relay or fuse
  • Winding short circuit or wire breakage
  • Mechanical displacement of the motor shaft

The main problem with cheap models, which for some reason few people pay attention to, is the improper casting of the blades. Because of this there is imbalance, broken bearings, increased clearances.

You can not affect it, since you have already bought the fan with this initial defect. Sometimes it seems to work, the impeller rotates normally, but it does not blow.

That is, there is no cooling airflow from it. Why it happens?

Improper blade angle of attack. Its blades are deformed and chase the air flow in a circle, but do not throw out.

This effect can appear over time, after the fan has been standing for a long time in direct sunlight and its impeller, having heated up, begins to change its shape gradually.

This can only be cured by replacing the impeller with a new one.

The unit does not turn on

There are two possibilities in this situation: the light indicating that the unit is ready for operation may or may not be illuminated. Depending on this, the algorithm for diagnosing the failure will be different.

The light bulb is not illuminated

If after switching the appliance into the socket the light located on its case does not come on, and it does not start, then, first of all, it is necessary to check whether there is voltage in the socket. This can be done simply by taking any electrical appliance and plugging it into this socket. If the unit works, then you need to look for a fault in the electrical plug and cord.

To check the plug, unscrew it and check the reliability of the connection of wires to the terminals. To check the cable, you need to disconnect it from the terminal block of the device and “prozvonit” with a tester. If a wire break is detected, the cable must be replaced.

How to fix your AC: fan not spinning

The light bulb lights up

The cause of this behavior when the unit’s indicator light is on, but the fan does not run or no sound is due to a malfunction in the button unit. To check the buttons, you need to disassemble the button assembly, located on the stand of the floor fan or on the stand of a tabletop unit. But, before you disassemble the unit, make sure it is unplugged from the outlet.

The operation of the buttons is very simple: there is an “on” and an “off” position. It is necessary to check the “output” and “input” on each key with a tester.

If a defective button is detected, it cannot be repaired. Therefore, the switch should be replaced or the connection should be made directly. This approach to solving the problem will help you start the unit if you are far from the store, for example, at the cottage.

Defective switches of speed can also be the reason why the fan does not turn on. To check the regulator, you need to put it in maximum position and check the “input” and “output” with the same tester.

How to disassemble the fan. instruction with photo

How do you get to the bushings without removing the engine?? First, unscrew the central screw on the back of the protective cover.

One more self-tapping screw is hidden in the adjusting button-lever to turn or stop the fan head.

After that, the back cover is easily removed from its place. What’s underneath? Here you can see the swivel gear that makes the whole head rotate.

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There is a special pull to it from below.

The motor starter capacitor is mounted 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 buttons of switching speeds.

To access the motor bearing you will need to remove the gearbox. It’s mounted on three screws and supported by a link from below.

Loosen the screws and disconnect the rod. Then the gearbox is removed from the shaft and you have access to the back bushing.

There’s no need to unscrew or disassemble anything else. Wax will do the rest for you.

Put a thin tube of WD40 spray on the bottle and spray it several times in the gap between the shaft and the bearing.

After spraying the WD40, turn the shaft by hand in different directions and move it back and forth a little.

Excess thickened grease, debris and dust will gradually come out. That excess dirt is easily removed with a cotton swab.

If you have a thick grease like Tsiatim or Lithol, it is advisable to apply it to the gear worm. After these cleaning procedures, you drop a few drops of sewing machine oil on the outside of the bearing.

Just don’t apply it too much. Otherwise it spreads all over and the dust sticks to it, which turns back into dirt. You’ll end up with a wedge and a fan rotation problem again.

In some models there are felt washers next to the bushings. They’re soaked in oil and as it heats up, the oil runs off onto the shaft, lubricating it.

Reassemble in reverse order. Pull rod. three screws of the gearbox. outer cover.

By the way, if you over tighten the central screw on the back cover, and it is a screw, not a screw, it can go through the plastic of the swivel gear and bump into the shaft.

You will have problems with rotation and seizure again. Sometimes the cause of the failure is trivial and unpredictable.

With the rear bearing you have solved, now move on to the front part of the fan. There is a protective cap in the center.

It unscrews clockwise, attention. in a clockwise direction, since the threads are left-hand.

Dismantle it and remove the propeller from the shaft. You can now access the front plain bearing.

The principle is the same. First you squeeze out and soften the old grease and dirt with a little vedishka, then apply new grease.

Then you put the propeller back on and close the cap. After completing the repair, turn on the fan at high revolutions, and letting him work so a few minutes, switch to the speed required.

Troubleshooting

Faults in floor fans and table fans are of 2 types. mechanical and electrical. Exactly the first ones the average man does not pay much attention to, but it leads to the breakage in the electric part of the device. For example, if the shaft is jammed, but the equipment continues to run, it will undoubtedly cause overheating of the electric motor. If the bearing becomes loose, the stator winding can become damaged.

different, directions

Disconnect the unit from the power supply before diagnosing the fan at home. The unit often does not turn on because of a faulty cord or socket, so first connect any other device to the power supply. If it fails to turn on, the culprit is a socket that needs to be repaired.

To inspect the interior of the fan, disassemble it, acting as follows:

Since the failure is often due to a lack of lubrication, be sure to drop a few drops of industrial oil on the bushing.

Turn the shaft first in one direction and then the other to soak in the lubricant. After that, assemble the fan in the reverse direction, turn on the device and check for proper operation.

To see more clearly how to disassemble the fan and make a diagnosis, see this

Construction of a typical floor fan

On the agenda repair of the floor fan with your own hands! You should start small: the simplest fans do not have a grounding terminal. The device does not have a degree of electrical safety. The structure of the floor fan includes the case, made of plastic. Water will get inside. expect a good shaking. A floor fan of this type should not be used near water. Starting with an aquarium with fish, ending with a flower vase. Particularly dangerous where small children live. The thing will fall and the child will guess to pour milk inside You can draw your own conclusions:

Nothing is likely to happen if the floor fan falls. Let’s dive inside the design. Let’s leave the speed control features of the motor and the buttons for now. Let’s talk about the gearbox. Krasnodar floor fan carries one asynchronous capacitor motor. The front side of the shaft through the pin, the nut with the left thread is connected to the blades, the back side goes to the reducer, formed by two gears, one double.

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The shaft has a thread that engages the teeth of the big wheel as it rotates. Torque is transmitted to the small wheel that drives the flywheel. Crank pinion has a diameter in the hand, so the rotation is inferior to the speed of the original shaft of the induction motor.

Through the cardan gear, the crank is hooked to the foot, the motor housing is put on the axle. When the asynchronous motor shaft rotates, the blades move smoothly to one side or the other. However, it is possible to stop the process. Double pinion shaft is secured to the bigger pinion by two balls with a spring inserted into a through hole. If you pull the knob directly connected to the axle, the latch slips up. Connection between pinion and shaft is lost, rotation stops. The mechanism implements a fall protection: six grooves are cut along the inner seating hole of the drive pinion. Ball bearings are accommodated. Six positions are obtained, the mutual transition is accompanied by a click, the axis rotates relative to the pinion, the balls hit the walls, slipping into the grooves.

Sounds of clicks are heard, high probability. floor fan has fallen down. Drive is jammed, the safety mechanism works by clicking, keeping the motor from burning up.

We believe the mode is disadvantageous to the floor fan, do not turn off the device, the thermal fuse of the motor is sure to break. Gearbox is attached by three bolts to the motor, cut a couple of lubrication holes through which you can grease the plastic gears. Applies to the drive, rotating at the speed of an asynchronous motor.

The headache of how to fix a floor fan and reassemble. We see the layout: wrong mutual position of the gear, the legs through the gear, the head of the floor fan will move asymmetrically relative to the front plane. May be annoying. Attach the gearbox, test the product by connecting the power. Careful not to electrocute, try to visually determine if the assembly is correct.

Faults of ventilation in apartments

Fume extractor fans are much simpler in terms of design. But their cost is low and it is often easier to buy a new one than to look for parts that have disappeared from circulation. Bad ventilating of premises may be connected not with the work of appliance itself but with the mistakes made while organizing the ventilating system.

Ventilation in the bathroom

If the ventilation does not work in the bathroom, the air becomes moist and does not ventilate, laundry dries badly, mold can appear.

  • the vent hole is clogged with dust and cobwebs;
  • Foreign objects in the shaft;
  • The exhaust fan is set to draw in instead of out.

The correct way to solve the problem is to contact the management company. Specialists lower a load into the vent all the way to the apartment to break through any obstacles. In particularly neglected cases, a camera is lowered into the shaft to locate obstacles. The ventilation shaft is opened from the entryway side. It may be necessary to bypass the neighbors in the riser pipe and check whether they have not correctly installed fans, which violate the hood.

Tip! Suitable for the bathroom extraction fan with a non-return valve, which prevents the flow of air from the ventilation shaft.

Extractor fan in the kitchen

The purpose of exhaust ventilation is to remove unpleasant smells and stale air from the apartment. However, in case of violation of construction technology or due to other reasons air from the exhaust vent begins to enter the apartment, despite the working fan.

Because of this there is a strange odor in the apartment. Cooking products don’t leave the kitchen. Causes can be the following:

  • Defects in the design of ventilation shafts and ducts create a reverse draft;
  • Strong gusts of wind in one direction blow air into the shaft
  • accumulation of steam masses and frosty air in the ventilation;
  • Snow and debris contamination of the shaft.

As a result, the axial fan pulls the air masses from one sump to the other and the hood starts to work silently in the opposite direction.

It is better to invite specialists to solve the problems. They will assess the rational use of equipment in accordance with the documentation and conduct a quality examination of the installation and operation of the ventilation system. The resulting report will indicate all the shortcomings of the existing system and measures to correct them. MC employees are required to clean the ventilation shafts of foreign objects. Also to get rid of the back draft effect in the hood install a deflector for smoke suction and create a slanting air currents in the kitchen.

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