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The Goodman 10123535 is a genuine OEM manual reset limit switch — identified by its red button — that serves as a flame rollout safety control on the AMH950904CXAE gas furnace and related Goodman/Amana models. Mounted near the burner assembly, it detects flame rollout or abnormal heat outside the intended combustion path and immediately interrupts the burner circuit. The red manual reset button distinguishes this higher-trip-point control from companion limit switches in the furnace and must be pressed by a technician after the fault is resolved.
OEM 10123535 is factory-calibrated to the rollout trip temperature Goodman specifies for this furnace. Aftermarket equivalents can differ in trip tolerance and terminal orientation. On a combustion safety device, exact OEM calibration is the safer choice.
Easy (1 of 5). Disconnect gas and power first. Transfer the two spade leads and secure the mounting screw. Repeated tripping indicates a combustion or venting problem that a licensed technician should investigate before returning the unit to service.