The small bathroom's ventilation fan has been intermittently making abnormal noise.
Took the plastic cover off of the fan (forgot to take a picture before starting).
The fan motor and mounting bracket is covered in a lot of dust...
First thing was to unplug the motor from the built-in two prong outlet. The fan assembly is conveniently designed with an actual outlet for serviceability (no need to disconnect power).
Vacuumed the motor and bracket.
Close-up picture of the main label.
It's a Broan Model 676-B/676F-B.
110 CFM (Cubic Feet per Minute) flow rate.
The motor/fan/bracket assembly comes out from the housing very easily.
There's just one screw that needs to be removed and the entire unit, including the bracket, comes out.
The wiring is very simple.
This is the functional unit. There's two tabs on the right side of this picture that engage a couple of slots on the side of the housing.
Then one screw through the hole in the middle of the left hand side of this picture is all that's used to fasten the assembly to the housing.
The fan on the other side of the metal plate is a plastic piece.
Looking at all the parts of the assembly, nothing is visually wrong with the fan, motor or hardware.
There's quite a bit of corrosion and on metal components, which is not surprising since the fan is evacuating high humidity air when the bath/shower is used.
The label on the motor.
120 V, 60 HZ, 1.3 A, 1,625 RPM.
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