Inner And Outer Mode Valve

The inner and outer mode valve is in position B when the air conditioning is activated, or when the bi-level or upper modes are selected. In this position, air flow is directed out of the A/C outlets. If the OFF, LOWER, DEFROST, or DEFOG mode is selected, the bi-level solenoid is de-energized. This will vent the vacuum from the inner and outer mode valve actuator, allowing the door to move to position A. The air flow will now be directed toward the heater and defrost outlets.