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Heating Ventilating and Air Conditioning

1994 grand am blows heat out of dash vents when set to defog not window vent cool air blows out of window vents when climate control is set on ac which no longer works is this a fuse or module problem?

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Wiki User
2006-08-25 22:16:22
2006-08-25 22:16:22

There is a small vacuum line for accessories in the engine compartment on top of the throtle position sensor that comes off and will cause this problem. very small hose...look on the intake throtle body for the sensor...it will have other vacuum hoses attached there also but this one is easily overlooked cause its so small. Hope this helps

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