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The Goodman/Amana A3468601 is factory 3/16 inch ID pressure-switch tubing for the AMS80703ANA 80% AFUE gas furnace. This small silicone/rubber hose connects the draft (pressure) switch to the inducer housing or collector so the switch can sense proper venting before allowing ignition. Cracked, kinked, or condensate-clogged tubing is a leading cause of pressure-switch lockouts and furnaces that ignite then shut down — replacing this inexpensive hose often clears the fault entirely.
Generic tubing can have the wrong ID or a lower heat/condensate rating, causing loose fits, air leaks, or premature hardening that skews the pressure reading. The genuine Goodman A3468601 matches the correct bore and temperature rating for a reliable, leak-free connection and accurate switch operation.
Easy — about 10 minutes. Power down the furnace, pull the old tubing from the switch and inducer ports, trim the new hose to length if needed, and press it on. Confirm no kinks and a snug fit at both ends before restarting.