What s going on with the electric fan buzzing and not turning?

1. Possible causes:

Fan. The reasons why the motor does not hum include the following points:

1. It may be an electric fan, there is no lubricating oil in the motor bearing position, and there is resistance to the rotation of the fan blades, so the motor will hum. 2. It is also possible that the circuit contact of the power supply of the electric fan motor is poor, such as the oxidation and corrosion of the governor contact, and the motor will buzz.

3. It is also possible that the capacitance of the electric fan is damaged, and the motor cannot rotate, so it will buzz.

Second, the electric fan does not rotate and there is a solution to the sound of Wengweng:

1.Directly use a new capacitor of the same model to connect in parallel at both ends of the original capacitor to see if the electric fan rotates (this step is to check whether the fan capacitor is invalid and the capacity is small, so connect a capacitor in parallel; If the fan is normal, it means that the capacitor failure capacity of the original electric fan is small, you can erase it and install a new capacitor at the same time. Of course, if you will use a "multimeter.

test, you will quickly find out whether the capacitor is leaking and the capacity is small. )

2.Then check the timing switch, gear selection switch, and anti-fall switch (some fans have) to see if the contact is poor or damaged, and replace it; Excluding these peripheral components, if it does not turn, it is generally certain that the motor is broken and proceeds down Step 3.

3.Use the "multimeter" resistance block r 100 gear, first test the motor wires at both ends of the capacitor to see if the "multimeter" has an indication, that is, check: whether the total coil of the motor is on, if not; The explanation is that the motor is broken (the coil copper wire is burned); If it is turned on but still does not turn, it is necessary to further test the rest of the wires to see if the motor has a local short circuit (the specific method is a bit troublesome, and it will confuse you; You only need to go through the first two steps to detect that if the fan does not rotate, it must be that the motor is broken); Another common fault of the motor:

Mechanical failures, such as: electric fans that have been used for several years, dirty and blocked; It is manifested as turning the shaft by hand, and you can spray it a few times with "gasoline" or "universal lubricating oil" at the motor shaft, so that the motor shaft can rotate flexibly (but it is best to replace the motor, because the motor that has been used for several years is dirty and blocked, mostly because the motor shaft and bushing are worn, and refueling can only temporarily solve the problem, and there will be dirty blockage without turning after too much), like you are a newly bought electric fan, disassemble the motor, and pay attention to the installation: whether you break the copper wire in the motor, in addition, you must pay attention, The motor shaft must rotate very flexibly, at least more than 2 turns; It cannot be touched with the stator steel plate inside; A cross driver can be used to gently tap the motor shaft until the rotation is very flexible.

1. The motor rotor shaft of the fan is stuck due to lack of oil;

2. The front and rear ends of the motor of the fan are deviated, causing the rotor shaft to be stuck;

3. The starting capacitor is broken (or the capacity is reduced), causing the coil of the starting winding to have no current (or the current is too small), and the motor cannot rotate;

4. The starting winding coil of the electric fan motor is broken, and there is no current passing through the starting winding at this time, and it will not rotate but only "buzz, hum". You can use a slight force to turn the blades without power to see if the motor rotates easily, if it can rotate easily, it is usually the fault of the starting capacitor and the starting winding. If it is difficult to turn, it is usually the reason why the rotor is stuck.

Pay attention to safety when operating with power.

First of all, turn the motor shaft or fan blade by hand without power to see if the rotation is flexible? If there is resistance to rotation, it means that the motor bearing is seriously worn or the lubricating oil is dry, and the new bearing should be replaced or lubricated to make it rotate flexibly without resistance. When installing the fixed motor, it is necessary to tighten the screws diagonally, and it must be tightened gradually, not in one step, and at the same time, it is necessary to hit the shaft back and forth with a wooden handle driver to ensure that the shaft is concentric with the bearings at both ends, so that the rotation will be flexible and without resistance after fastening.

If it turns flexibly without resistance, there are several reasons:

First, the capacitor is damaged, and a new capacitor of the same capacity should be replaced.

The second is that there is an inter-turn short-circuit fault in the coil, and the resistance value of the running winding and the starting winding can be measured with a multimeter to judge the quality of the winding. If the resistance value is not normal, it is better to use the new motor.

When the electric fan is turned on, the buzzing just doesn't turn, and the reason for this is:

1. The starter capacitor is not connected well and is disconnected.

2. The lead of the starting coil is broken, not energized, or the inside of the coil is broken.

3. The bearings at both ends of the motor are not well lubricated, the sludge is too thick, the friction between the rotor and the stator increases, the rotation is not flexible, and a few drops of lubricating oil are needed to lubricate and lubricate (most fan motors do not rotate because of this).

4. The fan blades are stuck, see if there is any mechanical failure.

The fan does not turn for the following reasons:Reason 1: When the fan does not rotate, the first reaction is that the plug is loose.

At this point, you can try plugging it back in to confirm. Then check if the fan's wires are disconnected. If the wire is broken or worn, the copper wire in the wire can break, causing a power failure.

Reason 2: The core component of the fan is the motor, and only the rotation of the motor shaft can make the fan rotate. After a period of use, due to the lack of lubricating oil on the shaft, the fan is difficult to rotate, and finally the fan cannot rotate.

If there is a power failure, move the fan blades by hand. If the fan blades rotate slowly, you can tell that the motor is lacking lubricating oil.

Reason 3: The capacitor of the electric fan starter is damaged. The starter capacitor will gradually lose its capacity over time, and when the capacity is reduced to a certain level, it will not be able to drive the load, so the fan will not be able to spin.

Here's what happens when an electric fan doesn't buzz:1. The motor rotor shaft of the fan is stuck due to lack of oil;

2. The front and rear ends of the motor of the fan are deviated, causing the rotor shaft to be stuck;

3. The starting capacitor is broken (or the capacity is reduced), causing the coil of the starting winding to have no current (or the current is too small), and the motor cannot rotate;

4. The starting winding coil of the electric fan motor is broken, and there is no current passing through the starting winding at this time, and it will not rotate but only "buzz, hum".

The buzzing sound of the electric fan does not rotate may be due to the lack of oil in the bearing, clamp the sewing machine oil to the root of the fan motor bearing, or it may be because the starting capacitor is damaged and needs to be replaced, or it may be that the motor of the electric fan is short-circuited, in this case, it is recommended to buy a new electric fan.

If the bearings of the electric fan are short of oil when the power is constantly on, the electric fan will not rotate or rotate slowly, and the bearing will hum because it is obstructed.

You can use your hand to toggle the fan blade to determine whether the bearing is short of oil, or the starting capacitor is broken or the motor is short-circuited, if you use your hand to toggle the fan blade, the resistance is relatively large, it is the bearing lack of oil, if the fan blade rotates smoothly, the starting capacitor is broken, if the fan blade can rotate, but soon stops, it is a short circuit of the motor.

The electric fan is loud and buzzing, but the blades do not turn the reason:

1.The motor cannot be started due to the decrease or failure of the starting capacitor capacity, which makes it difficult to start the motor after it is energized and makes a humming sound without rotating;

2.When the starting coil of the motor has a fault, it will also cause the motor to fail to start, and there will be a sound that does not run;

3.The shaft and watt of the motor increase the resistance due to the lack of oil, resulting in the failure of the motor to start or the difficulty of starting;

4.If the motor uses bearings, if the bearing beads are damaged, it will also cause the motor to be difficult to start and make a sound that does not run.

Solutions for the above situations:

1.If the capacity of the starting capacitor is reduced or damaged, it can be replaced according to the parameters of the original starting capacitor;

2.If there is a problem with the coil of the motor, it can only be replaced with a brand new motor;

3.The bearing resistance of the motor is high, so you can remove the motor, take out the shaft and pad, wipe it clean and inject oil into the linoleum pad. Before the test, you should use a screwdriver to gently tap the surrounding of the shaft to make it in the middle of the tile, and there is no resistance to transfer it by hand.

4.When the beads in the motor bearing are damaged, the whole bearing can be directly replaced, and when replaced, the shaft should not be damaged or seriously scratched with the puller, otherwise it will affect the use.

What's going on with the electric fan humming and not turning? I think if the electric fan doesn't hum, it may be that there is something wrong with the motor. You can go to the electrical repair department and fix it.

Dear, hello, the exhaust fan is buzzing but not **1, the motor covers the abnormal sound of the exhaust sound when the ventilation fan is running. (How to check:.)

Remove the ventilation fan and run it with electricity to observe whether there is any abnormal sound, or take off the wind wheel of the ventilation fan and electrify it to observe whether there is any abnormal sound when the motor is idling) 2. The sound of the ventilation fan exhaust is loud. 3. The friction sound caused by other obstacles when the ventilation fan is running. 4. When installing the ventilation fan, it is not fixed and produces vibration friction sound.

5. The exhaust pipe is bent or blocked. 6. Noise caused by the vibration of the ventilation fan and the ceiling. Have a great day!

After the electric fan is turned on, the hum just does not turn, which can be eliminated according to the following methods:

1. Due to the long use of the fan, the motor bearing is not well lubricated, and some oil is adhered to it, and the resistance of the motor bearing increases, and it is difficult to rotate. It is recommended to clean the bearing oil, add lubricating oil, and turn the fan blades by hand to rotate freely.

2. Check whether the starting coil and lead wire of the motor are broken, or the coil has been blackened or burned, resulting in no power after power-on and cannot start normally. The motor needs to be rewound and replaced.

3. If the starting capacitor is not connected well, or it is broken, check whether the starting capacitor is in good condition, otherwise replace the capacitor of the same type.

4. The motor bearing is seriously worn, and the radial clearance is too large (more than 1 mm), which attracts each other and stamps the rotor and stator after being energized. It is recommended to replace the motor bearings.

5. When assembling the front and rear covers after the motor is repaired, the installation is not suitable, and the rotor and stator are not concentric, and they scratch each other and cause no rotation. Loosen the fixing screws and gently tap left and right with a hammer to adjust the concentricity.

6. Pay attention to safety when repairing fans! Absolutely do not operate with electricity!!

The electric fan has the phenomenon you mentioned, it may be: 1, the starting capacitor of the fan is broken, causing the coil of the starting winding to have no current, so only the running winding has current through and cannot produce a "rotating magnetic field", and the motor cannot rotate; But if you "flip" the blades with an external force, the motor should be able to rotate, but at a slower speed. 2. The starting winding coil of the electric fan motor is broken, and there is no current passing through the starting winding at this time, as in the above situation, it will not rotate but only "buzz, hum".

You can remove the motor, remove the capacitor, and use the resistance of the multimeter RX1 to measure the three wires on the motor, if all are connected, you can prove that the motor coils are all connected, (of course, if the coil winding has an inter-turn short circuit, it is not in this case, because it is possible that the power will also turn, but it will be abnormal.)

Heat or smoke) can basically be judged as the capacitor is damaged, you according to the capacitor standard specifications (generally 400mm fan capacitor is around) buy a new one according to the original connection method to replace it should be able to eliminate the fault. In addition, if the lack of lubricating oil in the motor shaft can also cause a drop in rotational speed, you should add some high-quality oil to the motor shaft by the way.

The solution to the buzzing sound of the electric fan not turning:

1. Inspection and maintenance.

If the motor lubrication is not good, there will generally be noise coming out, and more seriously the fan does not rotate. If you pull the fan blades with your hands in the event of a power failure, the fan will also be a little stiff.

Solution: In this case, just add some oil to the motor, if you really can't find the lubricating oil, the vegetable oil used at home is also OK.

2. Replace the capacitor in the fan.

If the fan doesn't rotate, you can pull it out by hand or wait a long time to slowly turn it, and after using it for a while, you will find that it won't move when you pull it out by hand. The most likely cause of this phenomenon is that the starting capacitance inside the fan has become small enough to rotate the motor.

Solution: Replace the capacitors inside the fan, we can see the capacitors after removing the housing of the motor after the fan. We can replace the capacitor of the same specification, and the capacitor can also be a little larger than the original capacitor (no more than 20% of the original capacitance).

3. Replace the shaft sleeve.

After the fan has been used for a long time, the motor in the fan is lost, and the shaft sleeve of the motor is worn out, which is easy to burn off.

Solution: For the fan blades that do not rotate due to wear, the easiest way is to replace the bushing.

Notes:

1. It's simple to disassemble the motor, but it's not easy to install it back again, don't let the above situation happen, otherwise, it will be repaired directly.

2. If the motor is disassembled, the axial clearance of the rotating shaft is too large, and it should be adjusted by adjusting the gasket. When installing the motor, the rotor must be concentric with the bearing, the screws should be slowly tightened diagonally, and then the screw should be knocked on the shaft with a wooden handle to make it concentric.