Blend Switch (Dual & 3-Zone)

The dual sliding Blend Switches have multiple detents to control the full range of temperature that the system can produce an any mode. On Dual-Zone systems, the upper slide pot controls the driver-side blend door, while the lower slide pot controls the passenger-side blend door. On Three-Zone systems, the upper slide pot controls the driver-side blend door and, when activated, the Rear A/C-Heater Unit Blend Door. The lower slide pot controls the passenger-side blend door. Sliding the switch results in the A/C-Heater Control Module signaling the actuator to move the blend door. All door positions are determined relative to the number of commutator pulses required to provide full travel of the door. On command, the A/C-Heater Control Module runs the actuator for the number of pulses corresponding to the desired door position.