System Description

AIR CONDITIONING AND HEATING SYSTEM - AUXILIARY
An optional auxiliary air conditioning and heating system is available on the these vehicles. The system is a one-piece unit that is located on the left side of the vehicle between the side windows and the floorpan and behind the rear wheel well. The auxiliary air conditioning and heating system can also be equipped with an optional blower motor switch mounted in the rear of the vehicle.

The auxiliary air conditioning and heating system operates on the same principles as the heating/defrosting and manual air conditioning systems. The auxiliary air conditioning system is tied into the heating/defrosting and manual air conditioning systems which supply refrigerant and engine coolant.

Some vehicles may be equipped with auxiliary systems that appear to be, but are are not, Ford Motor Company original equipment.

CONTROL COMPONENTS
The manual climate control components are used to:
^ select the air inlet source (fresh/recirculated).
^ select the blower motor speed.
^ select the discharge air temperature (temperature blend).
^ select the discharge air location (defrost, panel, or floor).
^ activate compressor clutch operation.

CONTROL ASSEMBLIES
There are four different climate control assembly configurations in this vehicles:
^ heater only - standard production
^ air conditioning and heater
^ air conditioning and heater (w/ auxiliary air conditioning and heating system)
^ rear blower control assembly

CONTROL SYSTEM INPUTS
The climate control system inputs are manually selected from the climate control assemblies.

CONTROL SYSTEM OUTPUTS
The air management doors are controlled by the vacuum control motors, vacuum control motor, and the A/C electronic door actuator motor. The air inlet and distribution motors are controlled by the vacuum control motors. The temperature blend door is controlled by the A/C electronic door actuator motor. The temperature control switch position energizes the A/C electronic door actuator motor which provides for a variable number of temperature blend door positions.

The vacuum control motors are used on both the air distribution and air inlet doors. The air inlet and panel door uses a two-position vacuum control motor. The floor duct/panel door uses a three-position vacuum control motor. The vacuum control motors are controlled by engine vacuum through the climate control head.