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What causes a fan to stop working?

A fan may stop working due to various reasons such as a faulty motor, a damaged fan blade or bearings, or a malfunctioning capacitor. It may also be due to issues with the power supply, such as a blown fuse or tripped circuit breaker, or a problem with the fan's control system, such as a faulty thermostat or switch.

With the continuous development of technology, cooling fans are widely used in production life and even in all walks of life. However, after a long period of operation, many people have encountered the situation that the fan stops running. In this article, we will discuss the reasons for the fan to stop running from several aspects.

The reason why the fan stopped running

  • Motor Winding Failure: Motors contain electromagnetic coils that produce a rotating magnetic field to spin the rotor. If these windings fail or break, no magnetic field will be generated and the rotor will not spin. This can be caused by overheating, corrosion or physical damage to the windings. The solution is to replace the motor or re-wind the windings.
  • Stuck rotor: The rotor is the rotating part of the motor to which the fan blades are attached. If the rotor is stuck or jammed due to friction, corrosion or over-tightened bearings, the rotor will not spin even if a magnetic field is generated. The solution here is to release the rotor, repair or replace damaged parts such as bearings, and make sure it can spin freely.
  • Power Supply Failure: If there is a problem with the power supply, such as low or fluctuating voltage or a loose connection, it may not provide enough stable power for the motor to operate properly. The solution is to check all power connections, test the voltage output, and repair or replace any faulty power supply components.
  • Physical obstruction: There may be a physical object stuck in the fan housing or between the fan blades that is preventing the rotor from spinning. The solution here is to turn off the power, remove all debris from the fan blades or housing, make sure all parts are clean, and then restore power.


In summary, common reasons for a fan to stop running are motor winding problems, stuck rotors, or obstructions that prevent the fan blades from spinning. Diagnosing and fixing the specific faulty component should solve the problem and get the motor and fan working again.

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