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The Goodman 10123533 is a genuine OEM manual reset high-limit / rollout safety switch for the AMS950703BXAB 96% AFUE gas furnace. This normally-closed thermal switch opens the control circuit and shuts off the gas valve when it senses abnormal heat — typically from flame rollout, a blocked flue, or restricted airflow. Because it is a manual reset device, it stays open until the button is pressed, forcing a technician to investigate the root cause before the furnace can fire again. A tripped or failed limit is a common reason a furnace will not stay lit.
Safety limits are calibrated to a specific trip temperature. The OEM 10123533 guarantees the exact factory setpoint — a generic switch with the wrong temperature rating can nuisance-trip or, worse, fail to protect the heat exchanger. For a life-safety component, always use the genuine part.
Easy–Moderate (2/5). Two spade terminals and two mounting screws. Shut off power and gas, photograph the wiring, and confirm the same terminal orientation on the replacement.