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Chevy Astro

What causes the air conditioner to blow on the windshield and through the floor vents on a 2000 Chevy Astro Van?

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Wiki User
September 03, 2007 6:49AM

This sounds like a vacuum line problem. First thing I would check would be the vacuum lines and check valves contained in line with them, as well as the vacuum canister. Could also be a problem under the dash with the vacuum actuators in the HVAC unit. Another slight possibility also could be that the controller isn't functioning properly. Hope this helps. Good Luck!