Symptoms
- Fan doesn't turn on when the switch is flipped
- Fan runs but makes no airflow or unusual noise
- Bathroom stays steamy or humid after showers
Likely causes
- CommonA tripped breaker or GFCI feeding the bathroom circuitBathroom fans are often on the same circuit as bathroom outlets and lights.
- CommonA failed switchThe wall switch controlling the fan can fail independent of the fan itself.
- CommonA worn-out or seized fan motorYears of moisture exposure shorten the life of these small motors.
- PossibleA humidity-sensing or timer control malfunctioningFans with smart or automatic controls can fail at the control level rather than the fan itself.
- PossibleDust and lint buildup jamming the fan bladeBathroom fans rarely get cleaned and can accumulate enough debris to slow or stop the motor.
What to do
- Check the breaker panel and any GFCI outlets in the bathroom for a trip.
- Test the wall switch, confirming it clicks normally.
- Turn off power and remove the fan's grille cover to check for dust buildup on the blade.
- Clean the fan blade and housing gently with a vacuum and cloth.
- Spin the fan blade by hand with power off to check for a seized motor.
- If it's a humidity-sensing model, check the control settings and any reset button.
- Replace the fan motor or the whole unit if it's seized or clearly failed after cleaning.
Tools and parts
- Screwdriver
- Vacuum with brush attachment
Bathroom exhaust fan replacement motor or unitSearch: “bathroom exhaust fan replacement”
When to call a pro
Call an electrician if the fan motor needs replacing and you're not comfortable with the wiring, or if the switch or circuit itself seems faulty.
Safety
Use caution
Turn off the breaker before removing the fan cover or touching internal parts.