Locate and turn off the breaker for the bathroom electricity. The breaker panel box is usually located on the inside wall adjacent to where the outdoor electrical mount connects the home to the local power supply. Move the switch to the "off" position for the bathroom. Place a piece of electrical tape over the switch while you are working so it isn't accidentally turned on.
Grasp the grille cover for the unit and pull it toward you. Use a chair or stepladder, if needed.
Remove the fan motor and blade unit from inside the unit. This may be fastened to the side of the unit by clips or screws.
Unplug the fan unit from the wiring inside the fan. This could be plugged into the fan body or connected to the wiring with plastic sockets.
Loosen the screws holding the fan housing in place.
Pull the ceiling fan body out of the ceiling.