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Thread: No air from defroster vent

  1. #1
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    Default No air from defroster vent

    My 1986 olds 442 defroster vents will not put out any air, it did work fine previously.
    Air will only blow out of the front dash and heater vents, no matter what position the selector is in.
    Need to get this fixed before cold weather starts, thanks for any suggestions............

  2. #2
    Administrator 88hurstolds's Avatar
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    Vacuum vent selector manifold on the control head is bad.
    This vacuum diagram may help diagnose as well:
    Attached Images Attached Images
    Lightning Rods repair service:CLICK HERE
    Seller Feedback:CLICK HERE
    1988 H/OCA Advisor
    88 H/O #1 of 4
    88 CSC White/Claret - T-tops
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    87 442 Black/Gray - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Claret - T-tops
    85 442 White/Sage
    84 H/O Aero Commemorative #2199 - Sunroof
    83 H/O #2400 Sand Gray - Sunroof
    83 H/O #1607 Sand Gray - T-tops
    83 H/O #727 Maple
    "Keep them Rockets lit!"

  3. #3
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    Thanks, is this what you are talking about GM#16037778 and or Alt#36694, I found for $26.16 w/free ship. and made in US?

  4. #4
    Administrator 88hurstolds's Avatar
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    Yes, thats the culprit, try www.rockauto.com
    Lightning Rods repair service:CLICK HERE
    Seller Feedback:CLICK HERE
    1988 H/OCA Advisor
    88 H/O #1 of 4
    88 CSC White/Claret - T-tops
    88 H/O Triple Black
    87 442 Black/Gray - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Claret - T-tops
    85 442 White/Sage
    84 H/O Aero Commemorative #2199 - Sunroof
    83 H/O #2400 Sand Gray - Sunroof
    83 H/O #1607 Sand Gray - T-tops
    83 H/O #727 Maple
    "Keep them Rockets lit!"

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