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The Goodman A3468601 is a genuine OEM 3/16" inner-diameter pressure switch tubing designed for the AMH80905CNAC gas furnace and other compatible Goodman/Amana 80% AFUE models. This flexible silicone hose connects the pressure switch to the inducer draft assembly, carrying the negative pressure signal that verifies proper venting before the burners are allowed to ignite. Over years of thermal cycling the factory tubing can harden, crack, or collapse, causing nuisance lockouts and "pressure switch open" fault codes. Replacing it with the correct OEM length and diameter restores reliable, code-compliant operation.
Generic bulk tubing may seem interchangeable, but incorrect ID or wall thickness leads to air leaks, false pressure readings, and repeat failures. The OEM A3468601 is sized to the correct diameter and rated for the elevated temperatures inside a furnace vestibule, ensuring an airtight seal at both barbs and a fault-free start sequence.
Easy (DIY-friendly). Push-on connection at both ends — no tools required. Estimated time: under 10 minutes. Always shut off power and gas before servicing.