Question about 2002 Chevrolet TrailBlazer

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A/c fan not working on all speeds

Works on 4 (very strong) barely any air on 1,2,3,and 5.

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  • gerry bissi May 11, 2010

    check for a bad blower motor resister.

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Easy fix,there is a small electronic computer control that the blower motor runs through...can be mounted on the blower motor or under dash near floorboard,,,some of the circuits blow out and goes to failsafe mode and blows on one speed only...go to parts store and tell them whats happening and they should be able to tell you where its located...its a small elctronic circuit board,and should be under 50 bucks...hope this helps...Lee

Posted on Jul 30, 2009

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