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The Goodman/Amana M0570808 Button Plug is a genuine OEM cabinet fitting used to seal unused knockout and access holes on the sheet-metal panels of AMEC960603 series 96% AFUE gas furnaces. When a wiring, sensor, or accessory knockout is left open, this snap-in plug closes it to maintain the furnace's sealed combustion envelope, block air leakage, and keep debris and pests out of the control area.
The genuine OEM M0570808 is dimensioned to snap tightly into the factory knockout with no gaps. Generic universal plugs are lower cost but may fit loosely or require adhesive, compromising the panel seal. For a clean, permanent factory fit we recommend the OEM part.
Easy (1/5). No tools required — align the plug with the open hole and press until the retaining tabs snap into place. Always shut off power and gas to the furnace before opening any panel.