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The genuine OEM Goodman M0570808 Button Plug is the factory snap-in plug used to seal unused knockouts, mounting holes, and cabinet openings on the Amana/Goodman AMSS960805CNAA gas furnace. Sealing these openings keeps the furnace cabinet airtight, prevents dust and pests from entering, and maintains the internal air balance the burner and pressure-switch controls rely on. An open, unplugged knockout can create a draft path that draws in cold air or upsets combustion airflow.
Off-the-shelf hole plugs are often the wrong diameter and pop loose or leave gaps. The OEM M0570808 is sized to Goodman's standard knockout dimensions for a flush, secure snap-fit that stays put and keeps the cabinet sealed.
Very Easy (1 of 5). Seconds to install — align the plug with the open hole and press until it snaps flush. No tools required. Keep a few on hand, since these are commonly needed when relocating wiring or sensors. Leave all gas-furnace service to a licensed HVAC professional.