F 150 2WD V8-5.4L Flex Fuel (2008)
Expansion Block/Orifice Tube: Description and Operation
Evaporator Core Orifice Tube
EVAPORATOR CORE ORIFICE TUBE
NOTE: A new evaporator core orifice tube should be installed whenever a new A/C compressor is installed.
The A/C evaporator core orifice has the following characteristics:
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It is located in the condenser-to-evaporator line at the condenser fitting
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It has filter screens located on the inlet and outlet ends of the tube body
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The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the evaporator core orifice tube
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O-ring seals on the evaporator core orifice tube prevent the high-pressure liquid refrigerant from bypassing the evaporator core orifice tube
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Adjustment or service cannot be carried out to the evaporator core orifice tube. A new evaporator core orifice must be installed