I would like to repair an exhaust fan in a bathrooom.
The fan does not turn on when the swich is flipped. The light switch on the same fixture (it is a leviton dual switch fixture) works fine.
I began with the fan, as it is probably 20 years old. I opened the fixture from the bathroom side and found that the fan is mounted into a recessed fixure and then plugs in a 2 prong receptacle contained in the fixture.
I removed the fan, motor, and plug and cleaned all the fluff from it. I then plugged it in a different wall outlet and it worked.
I then reinstalled it, and it didn't work.
I measured the voltage at the receptacle in the fan fixture at 40 volts. I took apart the fan fixture. I removed the wire nuts connecting the house line to the internal receptacle in the fan fixture. With the wall switch on, the house line measured only 40 on my volt meter. The identical fan in the other bath measured 120.
I decided to replaced the switch. The wiring in the box has the hot wire enter via a GFCI and then act as a common to the 2 circuit switch. One then operates the light fixture in the BR (which works) and the other goes to the fan.
I replaced the 2 circuit switch. The light worked and no fan.
The receptacle in the exhaust fan fixture still showed low voltage.
I then got in the attic and inspected the romex, which is intact for the few feet I can trace it before it dives down in the wall.
What is my next step? It is a short in the house wire? Is the GFCI somehow limiting the fixture?