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How do you fix a heater?

This is a discussion on How do you fix a heater? within the Firebird / WS6 forums, part of the Vehicle Specific category; The heater in my car went out i have no idea what went wrong. I checked the fuses and thats ...

  1. #1
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    midnight blue
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    How do you fix a heater?

    The heater in my car went out i have no idea what went wrong. I checked the fuses and thats fine. A buddy told me to check my thermostat. Im looking a second opinion. Thanks

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    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    What exactly doesn't work? Blower? Blows cold air? Doesn't change positions between defrost, vent and floor?

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    midnight blue
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    it doesnt blow hot everything else works fine.

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    Member 20ws6speed01's Avatar
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    blue
    2001 WS6

    Do u feel the temp change a little when going from A/C"cold" to heater??Have u had the cooling system opened????
    Coolant leak????
    Last edited by 20ws6speed01; 10-20-2010 at 04:21 AM.

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    '02 WS.6 / '07 Suburban

    First thing to check -- do your heater hoses get hot? They are on the passenger side of the engine compartment and should be too hot to touch when the engine is up to temp.

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    the a/c is really cold but the heater doesnt get hot. there is temp change though

  7. #7
    autoconnectionllc.com 02transamce's Avatar
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    2007 Corvette
    Ebony

    F-body has a mechanical blend door actuator correct? My 96 mark VIII had a electric blend door actuator that broke and wouldn't allow the system to change from cool air to hot air,heater core was ok.
    Posted via Mobile Device

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    '02 WS.6 / '07 Suburban

    Maybe the vacuum source line at the back of the manifold?

  9. #9
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    yes the actual temp door is mechanically driven by a cable right off the knob. So no worries with vacuum.
    I'm guessing t-stat or clogged heater core.

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