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The Goodman M0570808 Button Plug is a genuine OEM snap-in cap used to seal unused knockout, wiring, and accessory holes on the cabinet and control box of Goodman ACEC960803BNAB series furnaces. Plugging open holes keeps the combustion air path sealed, blocks debris and pests, and helps the unit hold its rated airflow and efficiency.
Generic plugs are often sized loosely and pop out over time, leaving gaps in the cabinet seal. This genuine OEM plug is molded to the exact knockout diameter so it seats flush and stays put, preserving the factory air seal and appearance.
Easy (1/5). Push the plug into the open hole until it snaps flush — no tools required. Always shut off power and gas before servicing. If unsure which holes should remain open, consult the installation manual or a licensed HVAC technician.