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The Goodman A3468601 is genuine 3/16 inch inside-diameter pressure switch tubing for the AMH80703ANAB furnace and compatible Goodman/Amana models. This flexible, temperature-rated hose connects the inducer or collector box tap to the furnace pressure switch, letting the switch verify safe venting airflow before ignition. Cracked, hardened, or clogged tubing is a common cause of pressure-switch lockouts and nuisance no-heat faults. Replacing it is one of the cheapest fixes for a furnace that won't start.
OEM tubing uses the correct heat-resistant compound and exact ID for a leak-free seal on both the switch port and the collector box barb. Generic vinyl tubing may soften near the inducer, collapse under vacuum, or fail to seal, producing false pressure-switch readings. For a safety-circuit component, OEM is the right call.
Very Easy (1 of 5). Cut power, pull the old hose off both barbs, cut the new tubing to the same length, and press it firmly onto each port. Five minutes, no special tools. Verify a snug fit so no air leaks bypass the switch.