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The A3468601 is genuine OEM Goodman 3/16" inside-diameter pressure switch tubing for the AMV81155CXBB gas furnace. This flexible hose carries the negative-pressure signal from the inducer or collector box to the furnace's pressure switch, allowing the control to verify proper draft before ignition. Cracked, brittle, or clogged tubing is a frequent cause of furnaces that lock out on a pressure-switch fault, so fresh factory-spec tubing is cheap insurance for reliable startups.
Genuine Goodman tubing is rated for the heat and vacuum found inside a furnace and matches the exact bore needed for an accurate pressure signal. Generic hose may soften, collapse, or leak under vacuum, producing intermittent pressure-switch faults. OEM ensures a leak-free, correctly sized line.
Very Easy — slip the old hose off and press the new tubing onto the same barbs. Cut to the original length so there are no kinks or sharp bends.