1998 Chevy Astro Air Conditioning stuck on Defrost

1998 CHEVROLET ASTRO
110,000 MILES • 6 CYL • AWD • AUTOMATIC
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GJBEEMAN
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Hello! My heating/AC is stuck on the Defrost setting where air only blows up on the windshield and out the side vents that blow in the side windows. I have replaced the control panel, checked all fuses, tried manually moving the damper/solenoid that is located on the passenger side in front of the passengers right knee. Before tearing more apart, do you have an idea of where the issue is? Thanks- Gary 612-991-9374
Sep 19, 2009 at 8:26 AM
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MATHIASO
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stuck door actuator causes that problem, or a binding in the system for the door.
Sep 19, 2009 at 1:16 PM
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GJBEEMAN
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Definitely not a door problem. How could a door actuator affect the air conditioning?

The vacuum hose off the engine intake manifold was cracked and broken, so the control panel had no vacuum to it. I spliced the line and everything worked.
Sep 19, 2009 at 3:57 PM
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MATHIASO
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that is good you fixed it. there was no vacuum .
Oct 4, 2009 at 3:26 PM