noise when a/c is on

2001 CHEVROLET TAHOE
90,000 MILES
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PSYCO
  • MEMBER
  • 2 POSTS
When I first turn on car- there's a shoosh noice. This noise happens frequently when I have the a/c on. The air is cold but I get a noise that sounds like it's releasing air. Any ideas??
Sep 1, 2011 at 5:28 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Check to make sure the coolant is full. You may hear it filling the heater core.
Sep 1, 2011 at 5:47 PM
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PSYCO
  • MEMBER
  • 2 POSTS
coolant is full. The noise sounds as if air is being released for 5 seconds-then another release noise for 2 secs. Very strange
Sep 2, 2011 at 1:51 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
That's interesting. The only thing I can think of without being there is to check for vacuum leaks under the dash. The vent doors are actuated by vacuum. Maybe there is a leak.
Sep 2, 2011 at 8:44 PM
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