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The Goodman M0570808 Button Plug is the genuine OEM snap-in cap that seals unused knockout holes in the cabinet, blower deck, or junction-box openings of your ACVC961205DNBA gas furnace. Closing these openings preserves the cabinet's air seal, blocks rodent and debris entry, and keeps conditioned-space air from being drawn into the burner compartment.
Genuine OEM plugs are sized to Goodman's exact knockout diameter so the retention tabs lock and the plug sits flush. Generic plugs frequently pop loose under blower vibration or fail to seal a slightly oversized hole. The OEM M0570808 stays put for the life of the furnace.
Easy (1/5). No tools needed — align with the open knockout and press until the tabs snap home. Under two minutes. De-energize the unit before opening any panel.