Why do I get a hum from my electrical fan?

Answer by  les59 (852)

A hum from an electrical fan can indicate a ground problem, however, you need to check to see if your fan is working or not. If your fan is working then this may be a motor problem, if your fan is not working it may be time to change the fan out or have an electrican check it.

Answer by  Zon (122)

The electricity (110 VAC) that operates house fans alternates at 60 cycles per second. That electrical power creates a magnetic field that makes ferrous (iron containing) parts vibrate at that frequency (60 hertz). Another cause can be the fan blades reflecting ambient sound, causing the Doppler Effect, which causes energy (sound, RF etc. )modulation through motion of nearby objects.

Answer by  SallyJ (1010)

It could be that your fan is not quite balanced, and the vibrations are causing the noise. Another possibility is that the frequency of the AC running through the electric motor is causing the noise. You could try moving the fan, or placing a mat or something soft underneath it reduce the vibrations.

Answer by  hendry (37)

the hum from the electrical fan comesa because the bearings may be rusted. so there is no free rotation. So th hum from the electrical fan comes.