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    lkelly4646's Avatar
    lkelly4646 Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Apr 12, 2009, 11:24 AM
    1999 Chev Blazer Heater
    1999 Chev Blazer. I turn heat off and hot air still comes out vents, even when I shut vents off. Now the AC will not work. It only blows hot air. I guess it is heat from the engine coming through the vents but it is extremely warm. I would like to know what might be causing this before I take it to the repair shop. Thank you.
    mazak's Avatar
    mazak Posts: 148, Reputation: 5
    Junior Member
    		  
    #2

    Apr 12, 2009, 11:38 AM

    It might be the blend door,that is stuck.
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