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The Goodman M0570808 button plug is a genuine OEM component for the AMSS960402BNAA high-efficiency furnace and compatible Goodman/Amana models. Button plugs snap into unused knockouts and access holes in the furnace cabinet, sealing openings left after wiring, gas-line, or accessory routing. Sealing these holes maintains the cabinet's air integrity, prevents conditioned-air leakage, and keeps dust, insects, and debris out of the blower and control compartments.
OEM vs. Generic: This factory plug matches the exact knockout diameter used on Goodman cabinets, so its retaining flange locks in securely and sits flush. Generic plugs are frequently the wrong size and either fall out or won't seat, leaving an open hole that undermines airflow sealing. The OEM plug fits and stays put.
Install difficulty: Very Easy (1/5). Align the plug with the open knockout and press until the flange snaps behind the panel. No tools required — a few seconds per plug. Add plugs to any unused openings when finishing an install or service.
Sealing cabinet knockouts helps preserve airflow efficiency and keeps the internal components clean. Confirm the part number against your unit before ordering.