Fantastic Fan Whistling Noise on "In" - Fiberglass RV


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Old 08-04-2014, 07:57 AM   #1
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Fantastic Fan Whistling Noise on "In"

My 2012 new to me Scamp runs nice and makes normal fan noise on "out" at all speeds. Turned on the "in" fan selector for the first time yesterday and heard what I would call a whistling noise as the fan spins

Keep in mind I do have installed a MaxAir Roof Vent Cover. Just saying that in case it would make a difference in the diagnosis.

The whistling can come and go at times. Didn't know if there's any maintenance I should be doing to the motor or what not?

Your help is always appreciated.

Wendy


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Old 08-04-2014, 09:08 AM   #2
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Are you saying you have the MaxxFan or fantastic fan with a cover on it? Did it make the noise prior to installing the cover?
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Old 08-04-2014, 09:51 AM   #3
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Hi CPAHarley,

I have a fantastic fan, original to the trailer. Installed the MaxAir cover after the fact. Can't think of the model number...it's called fan mate.

I never used the fan prior as this is my first summer camping. Cover is supposed to allow max air flow.

Whistling comes and goes. Can't hear it on number 2 or 3. But I suppose that makes sense. Do these fans have bearings?


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Old 08-04-2014, 10:11 AM   #4
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I am not sure if they have bearings or bushings but mine had a small hole drilled into the top end to add oil. The motor and fan can be removed with 4 screws and be flipped over to add oil to the bottom bearing. If you could remove the fan without breaking it, the motor could be taken apart for a good cleaning and lubing. My fan blades were in pretty bad shape and were stuck to the shaft like glue (16 years old). Fantsatic Fan will sell you a new one(yes I tried to get a free one but no go) and they will sell it to you for cheaper that their dealers.
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Old 08-04-2014, 11:55 AM   #5
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Sometimes these fans will resonate and it will go away if you change speeds or tighten the screw on the fan or even put some oil on the shaft, any little change can eliminate the sound. Try it with the vent cover off, that maybe the culprit.
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Old 08-04-2014, 05:22 PM   #6
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I think it is applying pressure on a bearing that could use oil.
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Old 08-05-2014, 07:02 AM   #7
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Dear CPA Harley,

I'll have to get up there and check my owners manual on the fan. Not sure which screw you mean. Is there one at the top that holds the fan blades to the motor housing? Also not sure where the oil hole is but I suspect doing both of those things and otherwise monkeying around ill fix it.

Thank you!
Wendy


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Old 08-05-2014, 08:37 AM   #8
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I think the screw he is talking about is the hex head screw that holds the blades to the shaft. when you remove the motor /fan assembly, you can see it from the side (I think there was a cutout in the fan to allow an allen wrench to tighten it. My motor had a small hole drilled in the top of the motor but that may have been done by a previous owner. I used some oil call Triflow which is very light and flows well, it also contains teflon, but anything like sewing machine oil or even light engine oil should work. I do not recommend WD40 at all except to help with the hex screw if it will not move. WD40 is mostly alcohol and contains very little oil at all.
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Old 08-07-2014, 07:48 PM   #9
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Yes now I understand. Watched a vid on YouTube today of the whole process of cleaning. Just came back from a camping trip the other day and have been busy with laundry, grocery shopping and washing trailer. Plan on getting up there tomorrow to take a look see as to how dirty it is and get busy cleaning and oiling if I can find an oil hole. I have 3 in 1 but no sewing machine oil. I suspect it needs some cleaning and perhaps oil but can't be sure as I've never run the fan without the max air fan mate cover I installed in May.


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Old 08-08-2014, 09:44 AM   #10
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I think 3 in 1 is the same as sewing machine oil.
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Old 08-12-2014, 07:11 AM   #11
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Looked up there last night and did not find an oil hole. Checked top if motor and back sides as I faced it on the ladder. I did vacuum and clean it up good, although not very dirty, and got out a rather long piece of spidey web. Didn't hear any whistling on intake this time, but I would love to find an oil hole just the same.

Anyone know if that's a factory thing or just a mod that people do?


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Old 08-12-2014, 07:20 AM   #12
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there may no be a hole but a little oil may seep down the shaft and keep the bearings happy.
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Old 08-12-2014, 07:23 AM   #13
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In a sincere effort not to expose my stupidity, alas I fail. Where to squirt the oil then CPAHarley? Where the fan motor meets the blades?

And is CPA cert public acct?


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Old 08-12-2014, 09:28 AM   #14
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sent you a p/m
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