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  1. #1

    Default Climate Control probelm 99 Silverado

    my Climate control works fine a/c or heat either one as long as it blows out the dash. But as soon as you turn heat to defrost or floor vents blower shuts down. will still blow just a little but not near enough. Any thoughts were to start?
    DS

  2. #2

    Default

    does the blower actually stop or is it still turning, but the air is not coming out of the vents?

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  3. #3

    Default

    if the blower is still turning it is very low, can not feel or hear. But windshield will finally defrost, sorry i can not answer 100%.

  4. #4

    Default

    Sherri, do you have auto controls (set the temp to 70 and the system will keep it there), or the manual controls where you must change the dial to change the temp?
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  5. #5

  6. #6
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    Default

    Quote Originally Posted by Sherri's 2500HD View Post
    my Climate control works fine a/c or heat either one as long as it blows out the dash. But as soon as you turn heat to defrost or floor vents blower shuts down. will still blow just a little but not near enough. Any thoughts were to start?
    DS
    this is with what a/c system AUTO or MANUAL control ?

    disconnect the battery ground at the battery . turn ignition on to drain the system voltage. then reconnect and start vehicle see if the problem is corrected reset. with auto ac it may be the computer controller.

    if its manual control you got me on that one!

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