Explorer Sport Trac 2WD V6-4.0L VIN K (2007)
Evaporator Core: Description and Operation
Evaporator Core
NOTE:
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If an evaporator core leak is suspected, the evaporator core must be vacuum leak tested before it is removed from the vehicle.
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Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of
system contamination from a failed A/C compressor or damage to the suction accumulator.
The evaporator core is an aluminum plate/fin type and is located in the heater core and evaporator core housing. A mixture of refrigerant and oil enters
the bottom of the evaporator core through the evaporator core inlet tube and continues out of the evaporator core through the evaporator core outlet tube.
Air from the blower motor is cooled and dehumidified as it flows through the evaporator core fins.
Evaporator Core Orifice
NOTE: A new evaporator core orifice should be installed whenever a new A/C compressor is installed.
The evaporator core orifice is located in the condenser-to-evaporator line, and can be removed through an access fitting. The evaporator core orifice
provides a restriction to the flow of refrigerant from the high-pressure side of the refrigerant system and separates the low-pressure and high-pressure
sides of the refrigerant system.