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The Goodman M0570808 is a genuine OEM snap-in button plug designed to seal unused knockout and access holes in the sheet-metal cabinet of Goodman and Amana gas furnaces, including the AMVC960804CNBA modulating furnace. Keeping these openings sealed maintains proper combustion-air isolation and prevents conditioned-air leakage inside the burner and blower compartments.
The OEM M0570808 is molded to the exact diameter and retention-tab dimensions of the factory knockout, giving a flush, rattle-free fit. Generic universal plugs are lower cost but often loosen over time or fail to fully seal odd-sized openings. For a clean, permanent seal we recommend the genuine OEM part.
Easy (1/5) — No tools required. Simply press the plug into the open hole until the retention tabs snap flush. Always disconnect power before servicing your furnace.