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The Goodman A3468601 Pressure Switch Tubing is genuine OEM 3/16-inch inner-diameter hose used on the Amana/Goodman AMH80805CXBB gas furnace. This flexible tube connects the inducer/collector box pressure taps to the draft pressure switch, allowing the switch to sense proper venting before the control board permits ignition. Cracked, brittle, or clogged tubing is a frequent cause of pressure-switch faults and no-heat calls.
OEM tubing is cut and rated to withstand the furnace's operating heat and moisture without hardening or collapsing. Generic hardware-store tubing may seem interchangeable but can crack prematurely or fail to seal on the barbed fittings, reintroducing intermittent pressure-switch faults.
Very Easy (1/5). Slip the tubing onto the barbed fittings at both ends. Turn off power first, route the hose away from hot surfaces, and ensure snug, kink-free connections.