Mode Control
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
The mode control determines the air flow to the desired air outlet. The mode control is mechanically connected by a cable to the mode door. The mode door position determines the air flow to the ventilation, bi-level, heat, heat/defrost, or defrost air outlets. When the heat/defrost or the defrost position is selected, the A/C system is engaged automatically by a switch located on the side of the heater case. The A/C indicator does not illuminate when this switch is closed.