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1999 Chevy Suburban Vent system

Tiny
FASTER
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 135,000 MILES
My compressor seems to be pumping like a mad man but the vents dont really pump to much air. Is it possible there is something impeding the air flow? I had an aftermarket stereo put in a few months back, it was winter time, and that's the only thing I can think of that may have changed anything?

Any tips or ideas?
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Tuesday, June 30th, 2009 AT 5:19 PM

3 Replies

Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
There could be debris in the blower fan wheel.

There could be debris in the fins of the heater core, or of the AC evaporator.

A door in the duct work may not be moving like it should.

The blower fan may not be changing speeds, or spinning fast enough.

Your in cabin filter (if you have one) may be plugged up.
Like the furnace filter in your house after you forgot about it for 3 months.
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Tuesday, June 30th, 2009 AT 6:38 PM
Tiny
FASTER
  • MEMBER
  • 2 POSTS
Thanks buddy, I was trying to find a diagram of the Vent / ducting showing a r&r. Can you point me in the right direction for this?
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Tuesday, June 30th, 2009 AT 7:11 PM
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
PM me your email address and a note about your problem. And i'll email whatever pictures I can come up with.

The Image hosting here isn't very good.
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Tuesday, June 30th, 2009 AT 10:45 PM

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