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!