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Troubleshooting

Why Does My Exhaust Fan Not Work?

Written by Senior Electrician
Updated: Nov 2026

A non-working exhaust fan can lead to moisture buildup, mold growth, and poor air quality. Most issues are electrical, but some are mechanical.

Important Safety Warning

Working in ceiling spaces involves electrical hazards and fall risks. If you're not confident, call an electrician.

Common Signs & Symptoms

  • Fan doesn't turn on when switch is pressed
  • Fan runs but very slowly or weakly
  • Loud grinding or rattling noise
  • Fan runs continuously and won't turn off

Potential Causes

Why is this happening? Here are the most common reasons we see in WA homes:

  • Blown fuse or tripped circuit breaker
  • Faulty switch or timer
  • Motor burnout from dust buildup
  • Loose wiring connections

Troubleshooting Steps (DIY Safe)

  • 1
    Check if the circuit breaker has tripped and reset it.
  • 2
    Test the switch - if other lights on the same switch work, the fan may be faulty.
  • 3
    Clean the fan grille - dust buildup can cause overheating.
  • 4
    If the fan is old (10+ years), it may need replacement.

DIY vs Professional

In Western Australia, it is illegal to perform your own electrical work. While you can change a lightbulb or reset a switch, anything involving wiring or removing fittings must be done by a licensed electrician.

How we can help

If you haven't been able to resolve the issue with the steps above, it's time to call in the experts. Sparky Local carries the necessary diagnostic tools to identify the root cause quickly and safely.

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