Question about 2002 Chevrolet TrailBlazer

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The air conditioner/fan switch won't switch the direction of the air flow

When switching the dash air control switch the air continues to only flow from the floor vents

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  • wildland29 Sep 30, 2008

    If the problem is the control switch is this an easy fix? Are there micro switches in the control knob that select which vent/or direction the air should flow? Is there a fuse involved?

  • wildland29 Oct 01, 2008

    this solution sounds mor like the one i got from just ask. thanks

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There is a motor that controlles the swiching door above the gas peddal and slightly toward the passenger side. It could be the motor or the door itself. You can test this by switching the controlls from vent to defrost. if you can see the cables and gears on the motor move, more than likely you have a problem with the door. If not you will need a 7mm socket to remove the motor. This motor is a dealer only item.

OR
Your most likely issue is a bad hvac control switch. On older cars, this was operated by vacumm pressure, but on a 2002, it is all electrical. It may be that you need to replace the whole control unit.

Posted on Sep 30, 2008

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You have problem with vent control. it could be an electric controller or a vacuum controller. the problem could also be the switch itself, if it is a vacuum switcher, then maybe you dont have a vacuum supply from the engine.

tnx 4 using fixya,

drcool

Posted on Sep 30, 2008

  • francis rivero Oct 01, 2008

    i don't think it would be an easy fix if you will remove the switch. you have to remove the front panel before you can reach the switch.

    there is no fuse involve since the blower is working.

    by the way, let me just ask, did you just replace your battery or even remove the cables of the battery recently? they do have some effects on vents on some car models.

    tnx again,

    drcool


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THERE COULD BE A PROBLEM ON THE CONTROL SWITCH.

Posted on Sep 30, 2008

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tnx 4 using fixya,

drcool

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