Question about 2004 Chevrolet Astro

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ASTRO 2004 AIR CONDITIONER/HEATER CONTROL WILL ONLY BLOW ON THE WINDOW NOT ANY WERE EALSE

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  • morris7119 Mar 19, 2009

    I have the same problem except when you switch it to max a/c the fan doesn't speed up it stays at the same speed and will only blow at the window no matter where I set it

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Small vacuum hose(1/8 inch) is broken or has a crack causing a vacuum leak. Leak could be between intake on engine to vacuum canister or from canister to control inside van. It runs inside the wireing harness. Canister is mounted passenger side of engine bay. Black and about the size of a grapefruit. I had same problem on 2 astro vans.

Posted on Feb 08, 2009

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