Question about 1985 Oldsmobile Cutlass Supreme

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1985 Olds Cutlass Air Blowing out Defroster vent

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Anybody can just change parts until the problem goes away. Answer this first: Was the underhood of the car recently serviced? and did this problem appear at that time? Perhaps there is a vacuum line broken or disconnected. The Heat/AC idepends on vacuum to actuate the servos that direct air passage. I know that the control cluster is known to fall apart, but check vacuum lines first.

Good luck!

Posted on May 07, 2009

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The most common problem that causes this is a bad temp control, the actual selector module in the dash of the car. Try replacing this.

Posted on May 07, 2009

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The main vacuum for the vent controller is probably not hooked up. i had the same problem after i had the motor rebuilt.

Posted on Jun 01, 2009

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