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The Goodman B9102097 is a genuine OEM liquid line service cap supplied with its sealing O-ring for the WPC4336AMAA packaged air conditioner. This cap seals the liquid line service port, preventing refrigerant leakage and keeping moisture and debris out of the sealed system. A missing or damaged cap — or a dried-out O-ring — is a common source of slow refrigerant loss and reduced cooling capacity.
The OEM cap and O-ring match the exact thread pitch and seat geometry of the Goodman service port, delivering a reliable leak-tight seal. Generic caps may thread improperly or use an O-ring of the wrong size or compound, risking slow leaks. For refrigerant integrity, the OEM part is the safe choice.
Easy. Thread the cap onto the service port by hand and snug with a wrench per spec. No refrigerant recovery is needed to replace the cap itself. Always wear eye protection when working near refrigerant ports.