The computer starts the fan and does not rotate, but it turns when you touch it with your hand

The computer cooling fan rotates very slowly, which is caused by the following situations.

1. Due to long-term use, the fan is oily, resulting in astringent fan shaft and poor operation.

The fan blades adsorb dust, causing the fan to be heavily burdened, and the dust enters between the fan shaft and the shaft bowl, damaging their finish and increasing the coefficient of friction.

2. There are fluff and other things in the dust that are wrapped around the fan shaft, which increases the running resistance of the fan.

The easiest way to do this is to get a new cooling fan. If you want to repair it, you can open the case, remove the radiator fan, clean up the dirt and dust on the fan blades and shaft, lift the label on the fan, remove the sealant pad, first point a little gasoline on the shaft, manually turn the fan blades, throw the gasoline out of the fan, and use a flannel cloth to suck the gasoline dry, add some clock oil, cover the rubber pad, label, install the fan, and install it back into the computer case.

The problem of the fan, there may be insufficient lubrication, there may be deformation of the blades, you can replace the fan, you don't need to replace the entire radiator, just replace the fan, generally 7 cm 9 cm fan is not expensive, strong cold or GT or Kyushu Fengshen are about the same, 20 yuan. Beg.

1. If the fan does not rotate when the power button is pressed to turn on, it is recommended to enter "Lenovo Commercial Key Customer**", click "Expert **Service" to consult an engineer for repair, or click "Make an appointment for maintenance" to self-service repair equipment.

2. If the fan is rotating when the machine is turned on, and the fan does not rotate during use, please confirm whether the computer will crash or automatically power off during use. Because the current computer has a temperature control function, the fan operation is intelligently adjusted according to the actual needs of the fan control system, and if the set temperature is not reached, the fan will not rotate.

The electric fan can't start, so there are several reasons why you need to turn it with your hands:

1.If the capacitance decreases, replace the capacitor with a new capacitor of the same capacitance.

2.The motor bearing is dry, rusty and worn, and should be cleaned and filled with lubricating grease.

3.The power supply voltage is too low.

4.If there is an inter-turn short circuit fault in the motor coil, the coil should be rewound or replaced with a new motor.

What is the reason why the electric fan does not turn?

1.The priority is that the motor lubrication is not good, after disconnecting the power supply, you gently dial the fan blade, and find that the rotation is a little stiff, indicating that the oil is gone, and the shaft part should be lubricated with oil, and the rotation is very easy, indicating that the lubrication is good.

2.You have to consider how long the electric fan has been used, the motor will wear out, and the bushing of the motor will easily burn out after wearing. If the motor is used for a long time, the internal resistance of the motor will also become larger, and the load capacity will be lower, resulting in the inability to drive the fan blade to rotate.

3.The overheating of the motor will also cause the load capacity of the motor to deteriorate, and the active power of the motor will become low, resulting in the inability to drive the load.

4.From the inside of the motor, it has a protection device inside, and there is an overheating circuit breaker, that is, the coil winding part is short-circuited, resulting in a sharp increase in heat generation and a broken circuit breaker.

5.Another is that the starting capacitor capacity becomes smaller, although those parameters are written on the nameplate, but after a long time, the capacitance capacity will decrease, resulting in the starting torque of the motor becoming smaller, unable to drive the load. This is simple, remove this capacitor, and then replace it with a new one, and the same model should be fine.

But it's better to change to a 20% larger one than the original, and you will get better results.

6.Excessive axial clearance of the motor's rotating shaft can also cause the load to be unable to be dragged away. If the motor is disassembled, the axial clearance of the shaft is too large, and it should be adjusted by adjusting the gasket.

In the first case, there may be a problem with the starting capacitor of the electric fan, and its capacity is not enough to supply the electric fan normally to start. In this case, you should consider replacing a starting capacitor and give it a try.

The second case is that the rotor bearings of the electric fan are corroded. Therefore, the resistance to the rotation of the electric fan is quite large, and it cannot be started. You can use sewing oil to drip two drops on the bayonet of the bearing, and then do not plug in the power supply, use your hands to dial the fan blades, rotate for a few weeks, and after the electric fan is loose, you can turn on the button when the power is on, and you can start.

The electric fan uses 220 volt household single-phase alternating current, and its stator coil is different from that of an AC asynchronous motor, and the way of generating a rotating magnetic field is also different. The problem is on the starting capacitor, if the capacitor wiring is not disconnected, it must be the capacitor failure and damage, Hua Yuan went to the electronic component store to buy a product of the same product and replace it.

In this case, there may be two reasons, the first is that the capacitor is broken, and the second reason is that the shaft of the motor is worn, or there is a lack of lubricating oil.

Disconnect the power supply and gently turn the blades. If there is resistance, it is a lack of oil. If you don't feel much resistance, the capacitor is broken, and you can replace it with a capacitor.

Thank you for your question. Hope.

There may be a lack of lubricating oil, the initial resistance is large, and after adding an external force fan to rotate, it will rotate continuously by inertia and electric power.

It shows that it is not a circuit problem, but a mechanical aging that hinders the rotation of the fan blades.

In this case, the capacitor should be broken, and I really help you look forward to it

Summary. Hello, based on your above questions, we are happy to answer for you.

Dear, according to your problem description, it may be that the fan starts the capacitor to fail. You need to replace the starting capacitor. Generally speaking, the starting capacitor is broken, such as the starting winding of the motor is broken.

Most of the starting capacitors have failed, so replace the capacitors. No more, that is, the starting coil burned, and there is no help. That is the phenomenon that the capacitor is broken, the capacitor is used for starting, if it is broken (the capacity becomes smaller), it will cause no start or start suffering, according to the original specifications can be replaced.

The electric fan turns on the switch and does not turn, but it can be turned up by plucking it with your hand, what is the reason for this?

Hello, according to your above question, we are happy to answer for you, according to your problem description, it may be that the fan starting capacitor fails. You need to replace the starting capacitor. Generally speaking, the starting capacitor is broken, such as the starting winding of the motor is broken.

Most of the starting capacitors have failed, so replace the capacitors. No more, that is, the starting coil burned, and there is no help. That is the phenomenon that the capacitor is broken, the capacitor is used for starting, if it is broken (the capacity becomes smaller), it will cause no start or start suffering, according to the original specifications can be replaced.

The above is the answer to your question, if you have any other questions, I am always available to answer them

Hello Sun, I'm glad to answer for you!! First of all, when there is no power, use the hidden code hand to rotate the motor shaft or fan blade 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 the rotation is flexible and there is no 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 a short-circuit fault between turns 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.

1. It may be that the fan has not been cleaned for a period of time, and a lot of dust has accumulated inside, or there are obstacles blocking the braking function of the fan. 2. It may be that the continuous use time of the opening is too long, and the internal braking function will decline if it is used for too long. 3. It may be that the lubricating fluid inside the fan is not enough, and the frequency of the fan rotation will be greatly reduced, resulting in the failure that it must be toggled by hand.

Suggested Treatment:

If the fan has not been cleaned for too long, then you need to turn off the power, remove the air conditioner, clean it briefly, and then dry it. If there is an obstacle that blocks the brake function, you need to check it and clear the obstacle.

Sometimes it will cause the brake function to drop if it is turned on for too long, if so, it is recommended to turn off the fan for a period of time and turn it on. Or when the pin is turned off, you can change to a battery with a relatively high power.

3. If the lubricating fluid inside the fan is not enough, it may cause the fan to not rotate by itself, so it is recommended to turn off the power supply. Dial the fan blades with your hands, if you feel an obstacle when you turn or feel bumpy when you turn, just disassemble the fan and add some lubricating fluid inside.