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The Goodman M0570808 Button Plug is a genuine OEM fitting for the AMEC960402BNAB gas furnace. This snap-in plug seals unused knockouts, wiring, or access holes in the furnace cabinet and sheet-metal panels, blocking air leaks and keeping dust, insulation, and pests out of the interior — which helps preserve proper airflow and combustion-air balance.
The genuine OEM button plug is molded to the exact knockout diameter so it locks in securely and seals flush against the panel. Generic plugs vary in diameter and retention-barb design, and a loose plug can rattle out, allowing air leakage that upsets airflow and efficiency. The OEM part guarantees a tight, lasting seal.
Very Easy (1/5). Press the plug into the panel hole by hand until it clicks — no tools required. Power down the furnace before servicing. For any concerns during furnace repair, contact a licensed HVAC technician.