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Whistle noise in vents?

2019 Views 6 Replies 4 Participants Last post by  FordServiceCA
Every once and a while I hear a minor whistle noise up by the defrost vent under the windshield. Anyone else have this or know what it might be?
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Mine does this. Only noticed it after I had it in for a new cowl when the blower motor froze. It does it every time I put on max defrost.
Hey CanadianMark,

I saw your other post:
Please take a look at it. I requested some additional information to see how to assist.

Ford Service CA
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