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The Goodman A3468601 Pressure Switch Tubing is a genuine OEM 3/16-inch inside-diameter hose built as an exact-fit replacement for the AMH81205DNBA gas furnace and compatible Goodman/Amana models. It carries the vacuum/pressure signal from the inducer or collector box to the pressure switch, allowing the control to confirm proper venting draft before ignition.
Cracked, brittle, kinked, or condensate-clogged tubing is a frequent cause of a furnace that stalls before the burners light or throws a pressure-switch fault. Replacing the tube restores an accurate pressure signal and a clean ignition sequence.
OEM vs. Generic: The genuine tubing uses the correct 3/16" ID and a heat- and condensate-resistant compound, so it seals tightly on the barbed ports and won't collapse near the inducer. Generic hose of the wrong diameter or material can leak the signal or harden and crack quickly. OEM is inexpensive insurance for reliable operation.
Install difficulty: Easy. Power off, pull the old tube off both barbs, route the new tube the same way avoiding sharp bends, and press it fully onto each port. A quick 5-minute repair for most homeowners.