Question about 2004 Chevrolet TrailBlazer

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A/c air flow problem 2004 chevy trail blazer

The air only comes out the defrost vent and high speed blower inop, thank you for your help

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  • Anonymous Mar 15, 2014

    Any HELP would be greatly appreciated Thank You

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  • Master
  • 3,614 Answers

Check the resistor fan relay.

Posted on Aug 02, 2008

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1 Answer

2004 chevy trail blazer vent problems


If what you mean is that the air comes out the defrost rather than the vents, this may be a vacuum leak, bad vacuum check valve, or bad blend door actuator.

Jun 12, 2015 | 2004 Chevrolet TrailBlazer

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My windows are not defrosting properly.


Do you have heat? Does the fan turn on? are you getting air from the defroster vents close to the windshield? If you have heat make sure the defrost control is working. I'd open the outside air vent and turn the blower on high speed. If there is no heat, the heater control valve is not working. Double check the radiator fluid tank, make sure you have enough fluid (antifreeze) Low fluid levels can reduce the hot water flow to the heater coil inside the car. If there
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Feb 20, 2015 | 2004 Chevrolet TrailBlazer

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There is actually two blend door actuator that control the opening and closing of your vents. Ine is located under the drivers side dash board. The is on the passengers side. Both are electric and I didnt have the money to replace them so i removed them and turned it with a pliers to allow heat to come out of bothe sides of the vent. Then come summer flip the little bar back the other way to A/C
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