Improper Air Delivery - Without A/C

If the "Functional Test" or other diagnosis indicates improper air delivery or a failure to shift modes when moving the mode rotary knob, check the attachment of the affected control cable at the heater module. Make sure the cable loop is connected to the actuator and the cable sheath is retained. This action can be observed by removing the instrument panel storage compartment for access.

If the cause of the problem is not discovered, disconnect the control cable at the valve and check the air control valve travel and effort. If there is proper valve travel and effort, check the control cable travel at the heater module end while moving the mode rotary knob. If the cable end doesn't move, check for a broken cable or control assembly part and for an unattached cable end at the control assembly. Also, check for a sharp kink in the control cable sheath that could cause severe binding.