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The Goodman A1781105 1-Piece Vinyl Cap is a genuine OEM component designed for the ACSS960603BNAA furnace and related Goodman/Amana equipment. This protective cap seals off unused ports, terminals, or tubing ends, keeping out dust, moisture, and debris that could compromise furnace performance over time.
The genuine Goodman OEM vinyl cap is molded to the precise inner diameter and depth of your furnace's ports for a snug, secure fit. Generic caps are often loose or made from lower-grade vinyl that hardens and cracks near heat. OEM ensures lasting protection and a proper seal.
Difficulty: Very Easy (1/5). Simply press the cap onto the target port or terminal by hand — no tools required. Disconnect furnace power before servicing.