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AC/heater fan
#1
Hi all
I just installed my heater box and blower housing and when I switch it on, it makes a noise like the old fashioned playing card on spokes...
All new motor  and cage fan. New heater box too
Could it be hitting the heater box gasket?
The cage fan is about 1/4” away from the end of the blower housing opening and that part must “seat” against the heater box somehow. It would spin freely before I installed it so something happened when I put it in....
 any suggestions are appreciated
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#2
Not a lot there for it to hit. Foam gasket between blower and heater/ac box but that is a few inches from the blower. Does not seem that would make that sound anyway. Cage could be loose. Were there any labels on the new housing? More than likely you are going to have to pull the blower.

Kilgon


"The only dumb question is the one not asked"
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#3
Rmach1 Wrote:Hi all
I just installed my heater box and blower housing and when I switch it on, it makes a noise like the old fashioned playing card on spokes...
All new motor  and cage fan. New heater box too
Could it be hitting the heater box gasket?
The cage fan is about 1/4” away from the end of the blower housing opening and that part must “seat” against the heater box somehow. It would spin freely before I installed it so something happened when I put it in....
 any suggestions are appreciated
Your going to have to pull the blower motor back out and feel around inside the housing for anything that could be touching the fan. It's pretty obvious that there is some sort of material that has come loose and giving you that Cards in the spokes sound.

Going fast is fun but life is short so slow down and enjoy the ride Big Grin Frank
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#4
Might be some flashing from the molding process sticking out and making some contact.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#5
Does it make the noise at the lowest fan speed? I found the cage will make noise if it is not balanced correctly at medium or high speed. The cage usually has a few counterweights on it to balance it.

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#6
(09-02-2019, 08:18 PM)rackerm Wrote: Does it make the noise at the lowest fan speed? I found the cage will make noise if it is not balanced correctly at medium or high speed. The cage usually has a few counterweights on it to balance it.
Well it doesn’t move at all on the first two switch positions so I assume the first one is off and the second one may be hitting something and at that lowest speed it just doesn’t move
yeah I am going to pull it and see what’s up. Luckily we had just installed the dash but not the center or cluster so I do have pretty good access
thanks for the advice and I’ll let you all know what we find
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#7
(09-02-2019, 06:35 PM)mrmach1 Wrote:
Rmach1 Wrote:Hi all
I just installed my heater box and blower housing and when I switch it on, it makes a noise like the old fashioned playing card on spokes...
All new motor  and cage fan. New heater box too
Could it be hitting the heater box gasket?
The cage fan is about 1/4” away from the end of the blower housing opening and that part must “seat” against the heater box somehow. It would spin freely before I installed it so something happened when I put it in....
 any suggestions are appreciated
Your going to have to pull the blower motor back out and feel around inside the housing for anything that could be touching the fan. It's pretty obvious that there is some sort of material that has come loose and giving you that Cards in the spokes sound.
Yep I think that’s the next plan. Thanks!
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#8
(09-02-2019, 05:01 PM)Kilgon Wrote: Not a lot there for it to hit.  Foam gasket between blower and heater/ac box but that is a few inches from the blower.  Does not seem that would make that sound anyway.  Cage could be loose.  Were there any labels on the new housing?  More than likely you are going to have to pull the blower.
Got it. No labels or anything as far as I recall but it definitely requires a removal and look
thanks or the feedback
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#9
(09-02-2019, 06:49 PM)Don C Wrote: Might be some flashing from the molding process sticking out and making some contact.
Yes also a good suggestion so I’ll yake a look
thanks for the advice
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#10
Bench test it. If it vibrates you can clip on a weight and keep moving around until you get the best run. Like doing a ceiling fan. Also the last one I took apart had a split bearing in the motor. Needed new motor. I have a horrible squealing in one of mine now hate to have to pull. I always bench test and I also always air leak test the heater core have had two bad out of the box. If you did not test core I would pull and test now while dash is out.


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