Heater control valve location on 94 Grand Am

Could someone tell me where I can find the heater control valve on a 94 Grand Am 2.3L with A/C? I believe that I may have a broken vacuum line, bad heater control valve or bad connection. No matter which position I turn the control knob, air always flows through the vents; I cannot direct air through the defrost or floor.

Is the heater control valve the correct place to start troubleshooting?

Thanks!

Reply to
Jasolution
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There's really not a heater control valve anyway, and if there was, it wouldn't have anything to do with where the air is going. What you need is to focus on the dampers.

For vacuum-operated systems, the fail safe position is always defrost (the reason is obvious) so the fact that you have only vents is a little odd. You may have a damper that's stuck.

Reply to
Joe

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