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The Goodman 0130F00038 Auxiliary Limit Switch (identified by its light blue body) is the genuine OEM secondary safety switch for the AMH80804BNBA 80,000 BTU gas furnace and compatible Goodman and Amana models. This auxiliary limit provides an extra layer of overheat protection beyond the primary limit, opening the control circuit and shutting down the burners if a specific zone of the furnace — such as the blower compartment or burner area — exceeds its safe temperature.
The light-blue color code designates a specific trip temperature — installing the wrong set-point can cause nuisance trips or defeat protection entirely. This factory-original OEM switch guarantees the correct calibration and terminal layout. On a safety component, matching the exact OEM spec is strongly recommended over a generic substitute.
Easy — Disconnect power, remove the two spade terminals and mounting screws, and install the matching light-blue switch. Verify the color code matches the original before wiring. If the switch keeps tripping, have a technician diagnose the underlying overheat cause.
Order the genuine Goodman 0130F00038 for correct furnace safety operation.