Why Don't More People Replace This?, by Fix This Build That on YouTube. 23 min 34 s.
- Video length
- 23 min 34 s
- Time to do it
- 1 to 2 hours
- Difficulty
- Medium
- Steps
- 9
What you need
Steps
Turn off the power to the bathroom fan at the breaker panel. Test the wires with a voltage tester before touching anything.
Remove the old grille by pulling it down or unscrewing the clips. Set it aside and look at how the motor and housing are mounted.
Disconnect the fan from the duct and loosen the screws holding the motor or housing. Note which wire goes to live, neutral and ground.
Check the size of your existing housing. Buy a replacement motor that fits it, or plan to swap the whole housing if you want a quieter model.
Wire the new fan or motor using Wago connectors. Match live, neutral and ground exactly as the old unit was wired.
Secure the new motor or housing with its screws and reconnect the duct so it sits tight over the outlet.
If you are adding one, install a humidity sensor switch in place of the wall switch. Wire it the same way as the old switch.
Fit the new grille or magnetic cover and press it into place. Restore power at the breaker.
Run the fan and check for rattle or air leaks. Use a decibel meter to compare the new noise level to the old one.
Tips and common mistakes
Match the new motor to your existing housing size first, or you will be cutting drywall.
Seal the duct connection with foil tape so moist air does not leak into the ceiling.
A humidity sensor switch is often cheaper and easier than a full fan swap for a noisy old unit.
Never work on the fan with the breaker on, even if the wall switch is off.
Questions
Can I just replace the motor instead of the whole fan?
Yes, if you buy a motor that matches your existing housing. This is cheaper and avoids cutting into the ceiling.
Do I need an electrician?
If you are only swapping a motor or grille and the wiring is already there, most DIYers can do it. Call an electrician if you need a new circuit or are unsure about the wiring.
How do I know what size fan I have?
Measure the housing opening and check the model label inside the grille. Buy a replacement with the same dimensions.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
