Control Assembly: Description and Operation

Control Lever Assembly
The vehicle has cable-type-control to control the mode and temperature of the heater unit and the mode door for the air source of the blower assembly. The fan control is used to control the amount of air sent out by the resistor at four levels from LOW to HIGH.




Ventilation
Set AIR SOURCE SELECT LEVER to FRESH position and turn on the blower fan. Heating can be done in this lever position, sending in fresh air from outside. The blower fan also serves to deliver fresh outside air to the vehicle interior to assure adequate ventilation.




Air Select Knob
The air select knob allows you to direct heated air into the passenger compartment through different outlets.
1. Vent - In this position, air is discharged from the upper air outlet. Air quantity is controlled by the fan control knob.
2. BI-Level - In this position, air flow is divided between the upper air outlets and the floor air outlets, with warmer air delivered to the floor outlets than the air delivered to the upper air outlets.
3. Foot - In this position, air flow is delivered to the foot while sending approximately 30% of total amount of air to the windshield.
4. Def/Foot - In this position, air flow is delivered to the foot, while sending approximately40% of total amount of air to the windshield.
5. Defrost - In this position, most of the air is delivered to the windshield and a small amount is delivered to the side windows.

Moving the air source select lever to the CIRC position provides quickest heat delivery by closing the blower assembly mode door. In this position, outside air is not delivered to the passenger compartment.

Air Source Select Lever
The intake of outside air and the circulation of inside air are controlled by sliding this lever left or right.

Fan Control Knob
This knob controls the blower motor speed to regulate the amount of air delivered to the defrost, foot, and ventilation ducts:
1. Low
2. Medium Low
3. Medium High
4. High

Temperature Control Knob
When the temperature control knob is in the COLD position, the air mix door closes to block the air flow to the heater core.
When the temperature control knob is in the HOT position, the air mix door opens to allow air to pass through the heater core and heat the passenger compartment.
Placing the knob in a intermediate position will cause a lesser or greater amount air to reach the heater core. In this mode the passenger compartment temperature can be regulated