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1998 Chevy Astro Air Conditioning stuck on Defrost

Tiny
GJBEEMAN
  • MEMBER
  • 1998 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 110,000 MILES
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
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Saturday, September 19th, 2009 AT 8:26 AM

3 Replies

Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Stuck door actuator causes that problem, or a binding in the system for the door.
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Saturday, September 19th, 2009 AT 1:16 PM
Tiny
GJBEEMAN
  • MEMBER
  • 2 POSTS
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.
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Saturday, September 19th, 2009 AT 3:57 PM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
That is good you fixed it. There was no vacuum.
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Sunday, October 4th, 2009 AT 3:26 PM

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