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Q: ventilation system always blows warm air. on 1990 Porsche 944

cant switch recirculation,
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There is a door that is stuck open in the system. It is sending air straight from the engine to you . I had this problem when I first got my 944. It is a very small plastic piece that cost only about 3 dollars that is causing the problem. I took of the dash and replaced it in a few hours and fixed problem.
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