Question about 2000 Buick Century

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2000 Buick Century . Blower motor works but no air comes out of the vents. I move the controls to all settings and nothing changes. ir only comes in while on the highway, but very small amount.

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  • Richard Machado Jul 14, 2009

    no clue, i get hardly any air out of the vents, even on max.

  • Marvin
    Marvin May 11, 2010

    DOES IT COME OUT THE DEFROST?

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The louvers inside your vents are powered by a vacuum (?) that comes through a small rubber tube under your hood. I had to do some intensive googling to find this out. Usually what happens is that you change your battery, and accidentally pinch the rubber tube. If you're lucky, the mechanic will believe you before they start replacing parts. Maybe you can even find it yourself!

Posted on Jul 24, 2009

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JackieK55 is correct. The actuators are driven by vacuum with the manual heating and air system. A black, very small diameter vaccum line runs off the manifold around the cowling (on the inside), very near the battery and then through the firewall. Since I had complete power to the blower through low to high levels, I could rule out the motor, relays and resistor pack. I either had all actuators fail at once, or I had an common issue. The common issue in this case was a break in the vacuum line very near the battery. Saved hundreds of dollars by temporarily rejoining with 200 mile-an-hour tape (duct tape). The duct tape will work until I can get to AutoZone. I have the HVAC working again.

Posted on Oct 28, 2012

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