1999 Chevy Suburban Vent system

1999 CHEVROLET SUBURBAN
135,000 MILES • V8 • 4WD • AUTOMATIC
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FASTER
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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?
Jun 30, 2009 at 5:19 PM
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BUDDYCRAIGG
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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.
Jun 30, 2009 at 6:38 PM
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FASTER
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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?
Jun 30, 2009 at 7:11 PM
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BUDDYCRAIGG
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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.
Jun 30, 2009 at 10:45 PM