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Why does AC and heater blow air through defrost vents and will not blow air into cabin vents in your 97 Chevy lumina?
Wiki User
∙ 12y ago
You have either a bad "pot" which controls the door to the vents or, more likely, a vacuum leak or bad one-way valve. Does the air blow correctly when you let off the gas? If so, probably the valve.
just fixed mine an hour ago. follow the plastic vacuum line which comes out of the pass side top rear of motor close to the alternator. You can easily see it once you pop the hood. follow it over the brake master cylinder and then going to the front of the motor. Be careful not to pull on the vacuum lines too hard they are brittle and crack real easy. It will T off and go down into the fender. Mine was broken into 2. Plug it off with a screw a little smaller than the line and use some silicone to hold the screw in. Mine works like new. I did check a few other things before I found out I wasnt getting any vacuum inside car. so i might be able to help you once again if this isn't your problem. 1995 Lumina car 3.1.
Fastbackstang1970
Wiki User
∙ 12y ago
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