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The Goodman A3468601 Pressure Switch Tubing is the genuine OEM 3/16" inside-diameter hose that connects the pressure switch to the inducer draft port on the AMS81155CXAA 80% AFUE furnace and related Goodman/Amana models. This small but critical part carries the negative-pressure signal the switch uses to confirm proper venting before the burners light.
OEM tubing is rated for the temperatures and vacuum levels found at the inducer port and resists cracking and collapse. Generic hardware-store tubing can harden, kink, or leak, leading to false pressure-switch faults and no-heat lockouts. The genuine A3468601 ensures an accurate draft signal.
Cracked, brittle, or clogged tubing is a common cause of pressure-switch error codes. Replacing it restores a leak-free connection and reliable ignition sequencing.
Install difficulty: Easy. Under 10 minutes with no special tools — slip the new tube onto the switch and inducer barbs. Shut off power first and route the tube away from hot surfaces so it doesn't sag or trap condensate.