Aerostar 2WD V6-182 3.0L (1995)
Evaporator Case: Description and Operation
A/C Evaporator Housing
The split-case design referred to in the opening paragraph in this section pertains to the fact that the heater air plenum chamber, on the passenger
compartment side of the dash panel, attaches to the A/C evaporator housing on the engine compartment side of the dash panel.
The A/C evaporator housing includes the following subassemblies:
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A/C evaporator case
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A/C evaporator core and suction accumulator/drier with A/C cycling switch and A/C evaporator core orifice in the inlet tube.
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Blower motor.
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Heater blower motor switch resistor.
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Outside/recirculating air door controlled by the function lever in the A/C control.
The heater air plenum chamber includes the:
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Heater core.
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Temperature blend air door.
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Panel/defrost door.
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Floor/defrost door.
The temperature blend door is cable operated. The other two doors on the heater air plenum chamber are operated by separate vacuum control motors
which respond to function knob settings via the A/C control in the A/C control. The function knob, in all positions except OFF, completes the
electrical circuit for the blower motor. It also, by knob selection, determines when the A/C clutch will be engaged.
Major components of the refrigerant system include an FS-10 compressor and A/C clutch, an A/C condenser core, A/C evaporator core orifice,
multipass, S-flow A/C evaporator core, and a suction accumulator/drier with an A/C cycling switch.
For servicing the system, a high-pressure gauge port is available in the compressor discharge line near the A/C condenser core. A gauge port valve
adapter is required to gain access to the port. The appropriate adapter is described and illustrated later in the text. A low-pressure service gauge port is
provided on the suction accumulator/drier near the A/C cycling switch.
