Question about 2004 Chevrolet TrailBlazer

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My blower does not shut off when I cut my car off. I have to pull the fuse under the hood to make it shut off. When it's on, it runs on high and I can change it or the tempature controll.

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If you vehicle has the automatic temperature control system, where you can set the desired temperature using the digital temperature readout, then you most likely have a failing blower motor speed control module. This is an electronic module the controls the blower on/off and speed operations and when it fails it often won't shut off the blower when you shut off the vehicle which can result in a dead battery if you don't pull the power supply fuse. Its a small rectangular box located under the right side of the dash [passenger side] by the blower motor and isn't to hard to change. Hope this helps and good luck!

Posted on Jul 19, 2010

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