2003 Pontiac Vibe knocking noise

Tiny
KDBUG
  • 2003 PONTIAC VIBE

Air Conditioning problem
2003 Pontiac Vibe Automatic 90,000 miles

when the fan is on outside air there is a knocking noise from inside the dash. When the fan is set for inside circulation the knocking noise stops. What could this be?

Do you
have the same problem?
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No
Friday, October 8th, 2010 AT 2:09 PM

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