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The Goodman 10123529 is a genuine OEM manual-reset flame rollout limit switch for Goodman and Amana gas furnaces, including the AMH80804BXBA. This safety control opens the ignition circuit if it senses abnormal heat from flame rollout — a sign of a blocked flue, cracked heat exchanger, or restricted combustion air. Because it is a manual-reset device, it stays open until pressed, forcing an inspection before the furnace can restart.
The OEM 10123529 is calibrated to the exact trip temperature the furnace was certified with. Generic switches with the wrong setpoint may nuisance-trip or, worse, fail to protect against rollout. For a safety component, OEM calibration is strongly recommended.
Easy (1/5). Turn off power, unplug the two spade terminals, remove the mounting screws, and install the replacement. Roughly 10–15 minutes with a nut driver. Important: a repeatedly tripping switch signals an underlying combustion fault — have a technician diagnose the root cause, not just replace the switch.