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The Goodman A1781105 is a genuine OEM 1-piece vinyl cap used as a protective plug/cover fitting on Goodman and Amana furnaces, including the AMES960603BUAA gas furnace. This small but essential component seals unused ports and openings to keep debris, moisture, and pests out of the cabinet, helping the furnace run cleanly and safely.
The OEM Goodman A1781105 is molded to the exact port dimensions specified by the manufacturer, ensuring a snug, secure seal. Generic caps may fit loosely or degrade faster, so for a guaranteed fit we recommend the genuine part.
Easy — press-fit installation, no tools required. Typical replacement takes under a minute.
Not sure this is the right part for your unit? Contact us at info@nationalhvacparts.com and we'll confirm compatibility.