To remove excess moisture from your bathroom the fan needs to vent outside.
How to replace a bathroom wall fan.
The first step is to turn off the electricity of the bathroom from the breaker box.
Remove the existing fan leaving the old duct work and wiring.
Many bathroom fans are hard wired through your ceiling or attic.
Since a bathroom vent fan should run for 10 15 minutes after you finish your shower to remove all the moisture consider a fan that cuts on and off automatically using a moisture sensor or replace the wall switch with a timer.
Video tutorial on how to replace your bathroom exhaust fan in 5 minutes or less.
Turn the bathroom fan or combination light and fan on.
If your old fan wasn t attached to a joist and there is a space between the joist and the ceiling hole attach lumber to the joist to build it out next to the hole so the fan can be screwed to solid wood.
Call up your local city or county government and ask if you re allowed to do home.
I ve replaced lots of this style broan fan and they are very popular.
Double check the type of fan you currently have.
Connect power to both switches through two pigtails spliced to the feed wire.
Check if a permit is necessary.
If not you must cut around.
When the fan does not come on the circuitry in the fan may have failed.
Select your new fan.
Step 3 make template and insert screws.
Follow steps 3 10 of the new construction installation to complete.
Step 2 trace position of fan and cut out hole.
For a fan and light switch with existing wiring splice the white wires and connect the grounds securely with wire.
Switch off the power at the fuse box.
On the side of the hole opposite the joist attach a piece of 1x lumber inside the hole.
Measure the ceiling opening and determine if it is large enough to accommodate your new fan.
When you know the switch has power this is indicative that you need.
Add a bathroom exhaust fan in the wall.
Step 4 attach fan.
Connect the red wire to one switch terminal and the black wire to the other terminal.
Preparing to replace the fan 1.