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The Goodman A3468601 is genuine OEM 3/16 inch inner-diameter pressure switch tubing for the Goodman/Amana AMS80704BXAA furnace. This flexible hose links the pressure switch to the inducer or collector box, allowing the switch to sense negative draft and confirm proper venting before ignition. Cracked, brittle, or clogged tubing is a common cause of a furnace that ignites and shuts off on a pressure-switch fault — a quick, inexpensive fix.
Genuine Goodman OEM tubing is rated for furnace heat and holds a precise 3/16 in. ID for a leak-free press-fit. Generic tubing may have inconsistent wall thickness or poor heat tolerance, leading to nuisance lockouts. Given the low cost, OEM is the smart choice.
Easy. A true DIY repair — slide the old hose off both ports and press the new tubing on. No tools required. Turn off power to the furnace before servicing.