Ford 2003 Mustang Workshop Manual page 3178

A/C Evaporator Core
NOTE: The evaporator core is not separately serviceable, it is serviced only with the evaporator core
housing assembly.
NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning
system except when there is physical evidence of contamination from a failed A/C compressor or
damage to the suction accumulator.
The A/C evaporator core is the plate/fin type with a unique refrigerant flow path.
A mixture of refrigerant and oil enters the bottom of the A/C evaporator core through the A/C
evaporator core inlet tube and moves out of the A/C evaporator core through the A/C
evaporator core outlet tube.
This flow pattern accelerates the flow of refrigerant and oil through the A/C evaporator core.
Evaporator Core Orifice
NOTE: The evaporator core orifice is an integral part of the condenser to evaporator line and should
be installed as an assembly with the line.
NOTE: A new evaporator core orifice should be installed whenever a new A/C compressor is installed.
The evaporator core orifice has the following characteristics:
It is located in the A/C condenser to evaporator line.
It has filter screens located on the inlet and outlet ends of the tube body.
The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the evaporator
core orifice.
O-ring seals on the evaporator core orifice prevent the high-pressure liquid refrigerant from
bypassing the evaporator core orifice.