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Front defroster 2002

This is a discussion on Front defroster 2002 within the General Help forums, part of the LSx Technical Help Section category; How does the front defroster work? I put a dash cover on and it wont defrost yet there I dont ...

  1. #1
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    Front defroster 2002

    How does the front defroster work? I put a dash cover on and it wont defrost yet there I dont see any slots in the front of the dash for defrosting.

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    Spaz is My Mentor SMWS6TA's Avatar
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    There is a large vent going across the the pad.


    Now do you mean it's not working when you turn the dial to defrost? Like no air movement?

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    Member RONS98TA's Avatar
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    I'm thinking he has covered the vent with the new dash cover. Weird it wouldn't have the vent holes in it though.
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    vent

    Where is that vent hole you speak about? Is it in the center? If so my cover has a hole for that but air does not come out of it. Look at this dash pad:

    00 02 Firebird Trans Am Dashpad Dash Pad Top GM New GM | eBay

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    Spaz is My Mentor SMWS6TA's Avatar
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    Yup that is the hole.


    Ok either your switch that changes it over to defrost is bad or the HVAC vacuum tube has come off the back of the intake.
    Have you done any work on the intake lately?

    On the passenger side of the intake on the back side there is hard tubing that plugs into the back of the intake. If it's not connected the defrost will not move. It uses a vacuum to switch positions.

    Looks like this:


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    Hose

    Will other positions work with the hose disconnected? I am thinking everything works except for the defroster.

  8. #8
    Spaz is My Mentor SMWS6TA's Avatar
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    IIRC I believe it needs to a vacuum to move it from position to position.

    Know anyone with a f body? You could swap out temporary to see if it's the switch.

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