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The Goodman 10123529 manual reset limit switch is a genuine OEM safety control for AMS80804BXAC gas furnaces. This normally-closed thermal switch opens and cuts power to the gas valve if it senses an over-temperature or flame-rollout condition, protecting your heat exchanger and home. Unlike an auto-reset limit, it requires a manual press to reset — a deliberate design that forces you to investigate the cause before the furnace can relight.
The OEM 10123529 is factory-calibrated to the exact trip temperature specified for your furnace. Generic limits may trip early (nuisance lockouts) or late (a real safety risk). Because this is a life-safety device, we strongly recommend the genuine OEM part.
Easy — with power off, remove two mounting screws, transfer the spade connectors, and remount. Typically a 15-minute repair. If the switch tripped, always diagnose the underlying overheat cause (dirty filter, blocked flue, weak blower) before returning the unit to service.
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