Front Control Panel

- AUTO HI/LO This system features two sets of automatic control logic that allow either a rapid cooldown rate or a somewhat slower cool-down rate with less fan noise. HI-AUTO controls the system to reach its assigned temperature quickly with a higher fan speed. LO-AUTO controls the system to reach its assigned temperature somewhat slower with less fan noise. Both modes will automatically engage auto recirculation.
- DE-FROST The defrost function is activewhen the rear window defogger function is active or when the defog/defrost mode is selected.
- RECIRC The RECIRC button will close the air inlet door. If the system is in auto recirc (indicator being displayed automatically), pressing the manual recirc button will disable the auto recirc function until one of the auto keys are pressed or the ignition is cycled. If Auto HI/LO is pressed while manual recirc is active, manual recirc will be deactivated.
- REAR WINDOW DEFOGGER Pushing the button sends a PCI bus message to the Intelligent Power Module which controls the Rear Window Defogger and side view mirror (if equipped) circuitry. The defogger function will be active for 10 minutes and can be turned off by a switch press. The defogger will function while the control is in the ON mode.
- FAN/MODE The Fan and Mode knobs have 17 manual selectable positions. Manually changing either of the rotary knobs for mode or fan speed settings makes control of that blowe motor manual. If only one is changed manually, the other remains under automatic control. Pressing the HI-AUTO/LOAUTO rocker switch restores full automatic control.
- REAR CONTROL When the Rear System control knob is moved to the OFF position, there will be a delay of approximately 1 second before the system actually turns off. This delay is to prevent an undesired blower dropout if the knob is moved through OFF to the other selections.
- BLOWER DELAY TIMER The word DELAY is displayed at start-up to signify that the system is waiting so that cold air will not be blowing. This tells the operator that it is unnecessary to turn the system off, raise the temperature setting or turn the fan speed setting down to prevent cold air from blowing. A countdown in minutes and seconds until the engine is warm enough to begin delivering heat to the passengers alternates with the DELAY message at 25 second intervals. This countdown is based on actual measurement of the rate of engine coolant temperature change. During the delay time, mix mode is selected and the fan operates at a low speed to keep the windshield fog free.