Ceiling Fan "Growling" Noise


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Old 07-16-22, 09:00 AM
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Ceiling Fan "Growling" Noise

I installed a Hunter 72 inch HFC-72 six blade ceiling fan in my garage late last year. Shortly after installation, it began making a loud, "out of round" growling noise when on high speed (this is a three speed fan). The fan is controled by a 3 speed Hunter wall switch installed by an electrician. I did all the normal troubleshooting (checking for interference, out of balance, loose screws, etc) before contacting Hunter support. They agreed something was not right with the fan and sent a replacement. I carefully installed the replacement and it ran really quiet until it I stopped using it when cooler weather arrived. Now that summer is here, I am using it every day and it is now making the same loud, "out of round" groeling noise when ran on high. When I put my finger on the bottom area of the fan shaft, I can feel the grinding/vibration that is in time with the noise. All the troubleshooting was done again and no cause was found. However, I did noticed that when I run the fan on high after it has sat overnight, it runs really quiet for about 20 minutes before making the noise again. I contacted Hunter support again and sent them a video so they can hear the noise (I would attach that video here, but apparently I can't send a video on here). Hunter is sending another replacement fan. I would feel a whole lot better getting this new fan if someone could tell me what is causing the noise. Please let me know what you think is going on. Also, if there is a way to attach the video, please let me know what that is.
Thanks advance!!
 
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Old 07-16-22, 09:10 AM
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It sounds like the motor's bearings are garbage.
 
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Old 07-16-22, 09:31 AM
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Hunters used to be pretty good quality, we have had them for 30 years in all our houses. I only had to replace one a couple years ago and that was promptly replaced and is good so far.

Not much you can do, hopefully you just got lucky/unlucky with the prior fans!
 
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Old 07-16-22, 10:40 AM
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You'd need to load the video at you tube and post the link here.

That's pretty rare for Hunter fans.
I've heard Hampton Bay models that were pretty loud.

It doesn't necessarily have to be a bearing issue.
Sometimes fans have resonant hum and it's broken up as the fan turns.
It can be amplified thru the framing.
Resonant hum can be motor windings or just how a speed control reacts with the motor.

It would be interesting to bypass the wall control and see if the noise remains.
 
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Old 07-16-22, 12:13 PM
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PJmax, I tried to upload the video to YouTube and didn't succeed as the video is in a Quicktime .mov format.
I just used the fan again when my son stopped by. I turned it on high and no noise. After running for about 30 minutes this time, the loud growling started again.
 
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Old 07-16-22, 02:14 PM
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https://www.youtube.com/watch?v=cKwNAMGD0vk
I finally was able to upload the video with the sound of the fan.
 

Last edited by rdgallo; 07-16-22 at 04:01 PM.
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Old 07-16-22, 06:50 PM
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I listened to it a dozen times. Your description of growl is precise.
It doesn't sound like a bearing problem.

My next step would be to try it without the fan control in line.
Does the fan have pull chains ?
Do you know if the remote control is in the fan and the wall control talks to it ?
 
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Old 07-16-22, 06:57 PM
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PJmax, the fan is controled by a three speed wired switch on the wall (not remote controled) The wires in the wall that are connected to the switch are the same wires that go to the fan. There are no pull chains. I am not sure, but I think the 3 speed switch probably needs to be in the picture in order for the fan to run. It is maybe some kind of converter that keeps the fan from seeing the full 110 volts?
Attached is picture of the switch from the installation instructions.
When the new fan arrives with a new switch, I think I will install the new switch and run the existing fan with it to see if the noise goes away. When the first fan was replaced, I only intalled the replacement fan and used the same switch from the original noisy fan rather than replace it. I suppose the switch could be bad and that was what caused the noise on the first fan and since I am still using the same switch, it could be causing this replacement fan to be noisy? Thanks for your help!

 

Last edited by rdgallo; 07-16-22 at 07:25 PM.
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Old 07-16-22, 07:31 PM
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That looks like a generic speed controller. Not a Hunter supplied part.
Normally it should work fine but some controllers respond strangely with different fans.

There are some fans that have a "remote" control board in the fan and the wall switch talks to it.
Not a wireless type remote control.
Typically that type of control would have a light feature too.

You could post the Hunter fan model too.
 
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Old 07-16-22, 07:39 PM
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The Hunter fan model is HFC-72 (59136). Attached is the manual for this fan.
 
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Hunter hfc-72 Fan.pdf (7.84 MB, 38 views)
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Old 07-23-22, 10:10 AM
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The OP had the problems with more than one fan. Doubtful loose fan blades is the issue.
 
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Old 07-23-22, 12:58 PM
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Cybertech, I doubt the noise is caused by loose haardware. When I take it down to install the replacement fan, I will note if something is too easy to remove. Thanks for your input.
 
 

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