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Old 03-07-2013, 10:21 AM   #1
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Noisy Fan - Here's a recap of all that I've done

I have a Broan bath fan. Been there about 5 or more years. It started making noise but I don't know what it is. Here is what I've done so far.

1.) The noise starts only after the fan has been on for about ten minutes. There is no build up to the noise. It just starts full bore. It's a low rumble, not a screech or rubbing noise.

2.) I took off the cover and while it was spinning, I pushed the motor shaft up with a screwdriver and it immediately stopped. I can see no where that the cage is touching the housing.

3.) The cage seems to be stable, not bent or otherwise off kilter that I can see (it's plastic). It's really very quiet before the rumble starts.

4.) I cleaned the squirrel cage which really needed it. I put a drop of 3 in 1 oil on the top and bottom shafts of the motor. That stopped it for a couple days but now it's back (again, after about ten minutes or so).

5.) I bought a replacement motor but have not attempted to replace it. I guess I need assurance that is it. I'm not all that convinced it's the motor and I would hate to toss away the $68 I paid. I'm ready to send it back.

6.) I'm not sure how to release the motor from the cage even if I were to replace it. Are there videos out there on how to replace one? There's a clip on one end which I will assume you have to pry off with a special tool.

If can get away from actually replacing it I would be a happy guy. Any thoughts on this one?

Thank you.



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Old 03-07-2013, 10:43 AM   #2
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Sounds like the bearings in the motor have gone bad. Install the new motor.


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Old 03-07-2013, 10:59 AM   #3
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Joed is probably right. The sixty eight dollar fan has been Chinese balanced, which means not too damm well. Those class fans wear out bearings (probably oilite bushings) very quickly unless you just get lucky.
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Old 03-07-2013, 11:13 AM   #4
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Sometimes you can get a little more life out of them by adding some grease to the bearings. Usually not much for bearings though. Usually just a bronze or plastic bushing. But adding a little grease could help it.
With Electricity there is the right way to do it and the dead way. Just because it works does not make it safe.
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Old 03-07-2013, 11:46 AM   #5
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Thank you. I will replace the motor.

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Old 03-07-2013, 06:23 PM   #6
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put a flat head screwdriver close to the clip you are talking about and push it up between the fan bracket and the housing. turn slightly and it should pop out. some brands have a small screw, some don't. can't remember on broan. if you see no screw it should pop out.


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