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The genuine Goodman A3468601 Pressure Switch Tubing is factory-spec 3/16 inch ID hose that connects the draft-pressure switch to the induced-draft blower on the Goodman/Amana AMS80904BNAA gas furnace and compatible models. This small tube carries the negative-pressure signal that proves proper venting before the burners fire. Cracked, kinked, brittle, or moisture-clogged tubing is a common cause of pressure-switch faults and no-heat lockouts.
OEM vs. Generic: This genuine OEM tubing has the correct 3/16 in. ID and heat-rated compound to seal tightly on the switch and inducer ports without collapsing. Generic hose can be the wrong bore or a lower temperature rating, leading to poor sealing and false pressure-switch trips. OEM ensures accurate, reliable sensing.
Install difficulty: Easy — a true DIY job. Slip the old tube off both ports and press the new one on, making sure it seats fully and routes without kinks or low spots that can trap condensate. Takes only a few minutes. Turn off power before servicing.