Ceiling fan humming


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Old 02-11-15, 01:26 PM
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Ceiling fan humming

I have two Hampton Bay "midili" ceiling fans that I had set aside in the garage for about a year, recently I installed them and put them to work. One works perfectly, the other one has a mild hum that is really annoying. I thought it may be the speed control switch but no, I tested with a regular toggle, same hum. The hum is coming from the fan. No hum when fan is off, no hum when light is on. The hum is the same regardless of the speed whether its low, medium or high. Any idea? I reseated the fan in its housing a few times, no difference. Should I shoot some WD40 inside to see what happens? What else should I try?
 
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Old 02-11-15, 02:32 PM
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Don't spray WD40. Throw the fan into reverse. Does it have the same hum?
 
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Old 02-12-15, 06:45 PM
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Pulpo,

OK the plot thickens.

I changed the fan to reverse, no hum.

Waited a bit and switch it back, no hum.

Why? Makes no sense. Now the hum is gone since I reversed and back.
 
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Old 02-12-15, 07:42 PM
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Wow, it makes no sense but I wouldn't complain. I'll have to think about that one for awhile. Those answers usually come to me about 3AM.
 
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Old 02-12-15, 08:28 PM
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Microbit of debris in the bearing that got kicked out when it was reversed? Probably not.
 
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Old 02-12-15, 09:32 PM
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That answer is as good as any.
 
 

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