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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for the ADSS801005CXAB gas furnace and compatible Goodman/Amana models. This normally-closed bimetal switch monitors for excessive temperature or flame rollout at the burner box; if it detects an overheat condition it opens the circuit and shuts down the furnace, requiring a manual reset button press once the fault is cleared. It is a critical safety device that prevents heat-exchanger damage and unsafe operation.
The OEM 10123529 is calibrated to Goodman's exact trip temperature and mounting footprint. Generic switches with the wrong trip point can nuisance-trip or, worse, fail to trip during a genuine rollout event. For a life-safety component, the genuine OEM switch is the only recommended choice.
Two-screw mount with quarter-inch spade terminal connections; typically a 15–20 minute swap. If the switch keeps tripping, diagnose the root cause (blocked flue, cracked heat exchanger, low airflow) before returning the unit to service. Shut off gas and power before working.