1999 Toyota Corolla whistles through vents

1999 TOYOTA COROLLA
19,000 MILES • 4 CYL • FWD • AUTOMATIC
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99TOYOTACOROLLA
  • MEMBER
  • 1 POST
A/C whitstles when on. The higher the fan turns up the louder the whistle. Noise is coming from inside car, not under hood.
Mar 16, 2010 at 6:47 AM
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MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
You can try to take cowl off and look for leaves or debris caught in intake.

Could also be a blend door not fully closed, or the blower motor fan.

I would start with cowl.
Mar 16, 2010 at 10:39 PM
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