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The Goodman M0570808 Button Plug is a genuine OEM cabinet fitting engineered for the Goodman/Amana AMVC960403BNBA gas furnace and many other Goodman-family models. This snap-in plug seals unused knockout holes in the furnace cabinet and blower compartment, preventing air leakage, dust intrusion, and unwanted noise while keeping the equipment looking factory-clean.
Though small, this component matters: an open knockout can bleed conditioned air, disrupt combustion airflow balance, and reduce efficiency. Replacing a lost or damaged plug restores the sealed enclosure the furnace was designed around.
OEM vs. Generic: This is the authentic OEM Goodman part (M0570808), guaranteeing an exact diameter and retention-tab fit. Generic universal plugs may sit loose or fail to fully seal an OEM-spec opening — for a small fitting, the OEM part is the low-risk choice.
Install difficulty: Very Easy (1/5). No tools required — align the plug with the open knockout and press firmly until the retaining tabs snap into place. Always disconnect power before servicing your furnace.