Without Dual Zone A/C

The operation of the A/C system is controlled by the knobs on the control head. The compressor clutch and blower are connected electrically to the control head by a wiring harness. OFF is on blower switch. Cooled and dehumidified air is available in the Max, A/C, Bi-level, Defog and Defrost modes.

The rotary temperature knob controls the temperature valve through a potentiometer in the control and electric motor attached to the heater module. The modes of operation are controlled by a rotary knob that sends an appropriate electrical signal to the five solenoid valves that control the flow of vacuum on the various vacuum valve positioning actuators. Blower speeds (off, low, medium 1, medium 2, and high) are controlled in all modes by a rotary knob on the control head. The blower is turned off in the OFF position.

The temperature valve position is independent of mode selection.