Why Does My Ceiling Fan Hum. Because this not the proper way to control fan speed you will hear a humming noise. Replacing the switch with a compatible one usually solves the problem.
Many people install a dimmer switch to operate the fan with a variable speed. A ceiling fan could be humming because of the wrong speed setting loose screws not enough lubrication issues with the mount or misaligned blades. A hum in fan is generally due to the quivering of a motor and the amount of noise is based on housing blades and mounting.
Many people install a dimmer switch to operate the fan with a variable speed.
One of the most common causes of a humming ceiling fan is when dimmer controls are being used to control fan speed. However there are other reasons the fan voltage is too low. One of the most common causes of a humming ceiling fan is when dimmer controls are being used to control fan speed. One of the common reasons a ceiling fan makes an electrical humming noise is that the voltage the motor is receiving is too low.