HVAC Controller - General Description

HVAC Controller - General Description:

The operation of the A/C and heating system is controlled by the buttons and knobs on the HVAC control head. The compressor clutch, rear defog and recirc motor are controlled electrically by push buttons on the control head.

Blower speeds are controlled in all modes by a five position knob. The blower motor and compressor are not operational when the blower switch is in the (0) position.

The temperature knob controls the temperature door through a cable from the HVAC control assembly to the HVAC module. The mode knob controls the various mode positions using three separate actuators floor, panel and defrost located on the HVAC module.

The control head logic will automatically select outside air and A/C whenever defrost and heater/defrost is selected, regardless of the A/C and recirculation button position.