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Old 11-13-2015, 11:25 AM   #1
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Ceiling fan vibrates


I have a ceiling fan that vibrates.

It is not like a typical fan wobble. It is intermittent. It runs fine in slow speed, but vibrates on the highest speed. When it does, it is completely intermittent. It can run smooth for two minutes, then suddenly I hear this "ting ting" sound which is the glass light shade shaking a bit. Then another 10 seconds it goes back to normal.

I took the bottom part of the fan apart, and made sure everything is tight and secured. No loose screws. I checked the screws on all five fan blades, no issue. I didn't disassemble more than that. The vibration is still there after removing the glass light shade, just the sound is a bit different. When it does vibrates, it seems the speed of the fan slows a little.

Now if I flip the direction of the fan, instead of spinning clockwise to direct the air down, to reverse it. When I did that it does NOT vibrate, AT ALL. Why?

A bit more info. The fan was originally installed in a guest room. Rarely used. I don't remember seeing it vibrate. It was on two pull chains. One for light and one for fan.

Then last week I moved it to another bedroom, and at the same time, pulled one more conductor through the conduit so that I can use a light dimmer + fan speed control switch. I used a LSCLDC163PW Pass & Seymour TradeMaster® Single-Pole Preset Dimmer w/ Single-Pole 3-Speed De-Hummer Fan Control.

The fan is a Home Depot Hampton Bay fan.

Any idea what the issue may be?

Electrical box not secured to the framing?

Motor issue? If it's the motor wouldn't the reverse direction also vibrate?

Fan blade balance issue?

New switch compatibility issue - I had another fan some time ago by Hampton Bay and when I eliminated the pull chains and wired using a Lutron light and fan speed switch it "hums" and Hampton Bay said some fans are not "designed" to be wired with third party switches.

or is this just a crappy fan?

This fan is about two years old. Thank you for any advice or comment.

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Old 11-13-2015, 11:58 AM   #2
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If it is not true or the bearings are wearing out, then you will get the wobble at a higher speed. Most likely when you mounted it in the other room, it did not sit flat as it should. You could try the weights that they sell in the lighting & fan aisle, to see if that may fix it.

The other would be to drop it, make sure that the collar nuts are tight on the tube that is between the base and the motor housing. Same thing with the lighting kit.

The other is maybe take the blades off and see if it wobbles without them. If not, then could just need to put new blades on the unit.

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Old 11-13-2015, 12:28 PM   #3
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Is the fan too big for the room, mounted too close to the wall or getting a strong cross breeze? Could be the air flow is setting up a resonance in the fan.
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