General Information

Control Assembly Description

The heater and the A/C control head uses three knobs and four push buttons in order to control the following features:
^ The air delivery
^ The air temperature
^ The blower motor speed
^ The rear defrost
A vacuum/electrical wiring harness connects the compressor clutch and the blower motor to the control head.

Front Defrost
If the system is in FRONT defrost when the engine is shut off, it will restart in FRONT defrost unless the engine is off for longer than 40 minutes. If the engine is off longer than 40 minutes, the system will restart in the operating mode that was set prior to FRONT defrost.

Rear Defrost Button
Pressing the REAR DEFROST button will turn on the rear defroster. The first time the button is pressed will operate the rear defroster for 10 minutes. Pressing the REAR DEFROST button after the first 10 minutes of operation will allow five more minutes of operation. If the button is pressed during rear defroster operation, the defroster will turn off. The REAR DEFROST button also activates the heated mirrors. For descriptions of the various modes of operation, refer to Operating Modes.

Operating Modes
The air delivery modes for the Heater, Ventilation And Air Conditioning (HVAC) system are selected through a mode control knob and mode control buttons located on the HVAC control head.