Stand, Table, Wall fans
| Fault | Symptom |
|---|---|
| Start/run capacitor faulty | Fan doesn't start. Hums. Starts very slowly. |
| Speed capacitors faulty | Fan runs at certain fixed speeds. |
| Bad fit of mechanical parts | Plastic hum. |
| Bearing lubrication | Squeaky noise, pitch changes with fan speed. Excessive dust. |
| Imbalanced blades, loose bolts | Wobbly |
| Plug fuse blown | No power to entire appliance |
| Dust build-up | Poor airflow |