Expedition 4WD V8-281 4.6L SOHC (1998)
Accumulator HVAC: Description and Operation
NOTE: Replacement of the suction accumulator/drier is necessary any time a major component of the refrigerant system is replaced.
Major components include:
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A/C condenser core
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A/C compressor
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A/C evaporator core
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a refrigerant hose/line
An A/C evaporator core orifice or O-ring seal is not considered a major component but the A/C evaporator core orifice should be replaced whenever the
A/C compressor is replaced for lack of performance.
In addition to the preceding condition, the suction accumulator/drier should also be replaced if one of the following conditions exist:
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The suction accumulator/drier is perforated.
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The refrigerant system has been opened to the atmosphere for a period of time longer than required to make a minor repair.
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There is evidence of moisture in the system such as internal corrosion of metal refrigerant lines or the refrigerant oil is thick and dark.
