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The Goodman A3468601 is genuine OEM 3/16" inner-diameter pressure switch tubing for the Goodman/Amana DMS80453ANA gas furnace. This small hose carries the vacuum signal between the inducer/collector box and the pressure switch. Hardened, cracked, or condensate-blocked tubing is a leading cause of furnaces that ignite briefly then lock out on a pressure-switch fault.
Generic vinyl tubing stiffens and cracks under repeated heat cycles, causing intermittent pressure-switch trips that are maddening to diagnose. The OEM Goodman A3468601 uses heat-rated silicone with the correct ID for a leak-free push-on fit and a stable draft signal.
Very Easy (1/5). Disconnect power, pull the old hose off both barbed fittings, and push the new tubing fully onto each port; route it with no kinks or low spots that trap condensate. Trim to the original length if needed. A 5-minute repair with no tools.
Clear nuisance lockouts with the genuine Goodman A3468601.