not run

run slowly

run fast

run with noise

Top cover of the fan

Body of the fan

Shaft of the fan

Canopy of the fan

length of the blade from fan centre

the distance between adjacent blade tips

the diameter of the circle formed by the blade tips of the fan

the breadth and length of the blade

The rotor of the fan is changed

The bearing of the fan is changed

The rotor position is changed

The blades of the fan is changed

the blades are out of balance

the spur gear with broken teeth

the defective speed control switch

the loose guards