shaded pole type
split phase type
capacitor start type
capacitor run type
over loading
shorted stator winding
worn out bearings
low or high voltage
low voltage
high voltage
blown fuses
open circuit in auxiliary winding
open circuit in main winding
any of the above causes
improper size fuses
worn out bearings or low voltage or over load
open circuit in the winding
short circuit in the winding