We have lived in this house over sixteen years. Since the week we first moved in, I thought that a bearing was bad in the fan unit since it made a vibrating sound. I was even going to replace it one time about three or four years ago but the shelving stock was out. I looked for several months thereafter but then forgot about it.

Instead of just being noisy, it started getting to the point of not actually working. You could hear the power applied but the fan wasn’t moving always. Sometimes, flipping the switch a couple of times would get the fan going, sometimes not. I decided that now was the time to finally do this.

I checked the availability at the box store and it was in-stock. My experience over the years has taught me to visually inspect the unit before doing anything. I wanted to make sure that I was replacing the unit as quickly and painlessly as possible. You could say a like for like swap is what I was looking for.

Much to my surprise, the fan was not a 50 CFM unit but a 70 CFM unit even though the bathroom is only 3×5′. So I started looking a little closer at my ordering options because I was not going to be able to go to the store for several days. When I looked on Amazon, I realized that I would not have to tear the entire housing out like I had done with the two others I replaced but I could swap the motor/fan assembly out only saving tons of effort.

Then, I went to the local hardware store and bought a replacement motor/fan unit. When I took the unit apart to replace the motor, I think I identified multiple issues.

If you see how dusty the outside is, you can imagine that there is 30 years of dust caked on the motor and fan. I suspect that the dust on the outside of the motor housing was causing the motor to overheat. I didn’t bother cleaning it and putting it back since I thought there was also a worn bearing causing noise.

My wife really wanted a new fan since the outside bezel was yellowed from age but I convinced her that I could just spray paint the old one and it would look much better. Before I started painting, I stuck the screw back in the housing so it wouldn’t get lost in the process. The screw was not what originally was part of the unit and when I turned on the fan, it was vibrating and making a ruckus while it was not holding the bezel tight. In the end, I decided that the noise I heard all those years was the screw vibrating and not a bad bearing.

When I put it back together, I put several wraps of teflon pipe tape to give some extra dimension to the screw and hopefully act as some padding. The fan is still loud because it is oversized for the room but works like a champ. I cannot say how much less effort the replacement motor is over a whole new unit. However, it is more expensive – imagine that but the cost was worth it.

Over time, these units do suck up dust and it ends up coating the electrical components. The one in the master bath I have cleaned several times because I can see dust on the outside, but never this one. Periodic maintenance would be recommended for long life.

End Your Programming Routine: The lesson that I would like to push today is look and understand the failure. It is highly possible that there was nothing wrong to begin with other than the dust needed clearing. This is at least the fifth fan that I have replaced but I never knew that a replacement unit could slip into the existing housing. So, I suppose $40 was a good investment in education.