Question about 2000 Chevrolet Astro

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No air from dash vents

No conditioned air from interior vents even though blower is running, but max blower is inop. Apparently the vent valves don't open.

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  • slaten Jun 28, 2009

    Conditioned air (heat/cold) only comes out of defrost vent, but none from dash vents. Four position fan control works except on high. If these are vacuum controlled, how do you access the lines?

  • Ronald Park
    Ronald Park May 11, 2010

    Do vents work okay otherwise?

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  • Master
  • 855 Answers

They are vac. controled. The leak could be behind the controls, but first check under the hood usually near the fire wall and check for any cracked or broken vac. lines and repair as necc. this should solve your problem. The vac. lines under the hood go bad first due to engine heat. If you have a length of line to replace make sure you use vac. line so it wont collapse. Soft softs in vac. lines is another sign of a bad line replace these also.

Posted on Jun 28, 2009

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