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The genuine OEM Goodman B9102097 Liquid Line Cap with O-Ring is a factory-spec sealing cap for the refrigerant service port on the Goodman WAHME4260P4ACA air handler. The included O-ring provides a leak-tight metal-to-metal seal that prevents refrigerant loss and keeps moisture and contaminants out of the sealed system. A missing or worn cap is a frequent source of slow refrigerant leaks — this OEM cap restores the factory seal exactly.
OEM vs. Generic: Generic caps often use the wrong thread pitch or a substandard O-ring that hardens and leaks over time. This OEM cap matches the original thread and uses a Goodman-spec O-ring rated for refrigerant service temperatures and pressures.
Install Difficulty: Easy — hand-thread the cap onto the service port and snug to spec. No tools or system evacuation required in most cases. Under 5 minutes.