Question about 2004 Chevrolet TrailBlazer

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My 2004 Trailblazer heater/AC fan stopped working on level 5 a few weeks ago. Yesterday my wife called and said it stopped working all together. Do you think it would be the switch or the resistor?

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It is must likely your fan control model -it control's
the fan speed location of model is next to blower

Posted on Nov 14, 2009

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Resistor

Posted on Jan 28, 2010

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OUR 04 TRAILBLAZER, THE A/C STOPPED WORKING, IT WOULD WORK SOMETIMES AND BLOW COLD AIR NOW NOTHING COMES OUT, OR THE HEATER TOO.. LITTLE AIR WILL PULL THROUGH IF ON THE HIGHWAY, I CAN HEAR IT CLICK OVER...


a couple of things,1 blower motor fuse.2 blower motor gone out.3 switch on fan speed control switch not sending signal to fans.after checking the fuses.next check theswitch on control panel.set ac or heater.if fan still doesnt come on then replace it.when it work and then stops working there are a lot of possiblities that caused the prob relay too not fliping over inside staying close loop.hope this helps.

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