Thread: Noisy a/c vent?
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Old 03-20-2017, 02:14 PM   #20
Ultramaroon
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Quote:
Originally Posted by Da Brz View Post
Mine started doing this just this weekend. Didn't do it before. It's loud enough for my passenger to notice it.

I assumed it was a leaf or something in there, but there's no trees in my yard or near my parking lot.

I dunno. One of those "wait and see" things.
Junk normally shouldn't get in there because the blower is downstream of the cabin filter. It's not a perfect world, though.

The motor brushes are molded out of a fine powder similarly to the way pencil lead is made. Ever encounter a chunk of "something" in a pencil lead that isn't exactly pencil lead? The same thing can happen with motor brushes. When that happens the brush can get a little noisy until the snag breaks free.
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