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The Goodman M0570808 Button Plug is a genuine OEM snap-in plug designed for the Goodman ACEC960403BNAB gas furnace. It seals unused knockouts and access holes in the furnace cabinet, blocking unwanted air infiltration, dust, and pests while maintaining the cabinet's designed airflow and combustion-air integrity. Missing button plugs are a frequent cause of efficiency loss and cabinet noise.
Generic plugs are sized to nominal hole diameters and often pop out or fit too loosely in the ACEC960403BNAB cabinet. The genuine Goodman M0570808 is matched to the factory knockout, so its barbs grip correctly for a permanent, flush seal. For a leak-free cabinet and proper combustion-air balance, the OEM part is the recommended choice.
Easy (1/5). No tools required — align the plug with the open knockout and press until the barbs snap home. Always disconnect power and gas before opening the furnace cabinet. Installs in seconds.
Genuine OEM quality you can trust. Verify your furnace model and serial number before ordering, or contact us for fitment help.