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The Goodman 10123529 is a genuine OEM manual reset limit switch engineered for the AMH80805CXBC 80% AFUE gas furnace and compatible Goodman/Amana models. This safety device monitors for abnormal heat conditions such as a blocked flue or flame rollout, and cuts power to the gas valve to protect the heat exchanger and your home. Because it is a manual reset design, it must be physically reset after a trip, giving you a clear signal that a fault occurred and needs attention.
OEM vs. Generic: The OEM 10123529 is calibrated to Goodman's exact trip specification and mounting footprint, ensuring drop-in fit and reliable safety response. Our generic-equivalent option meets the same electrical and temperature ratings at a lower price point, ideal for budget repairs where an exact OEM stamp is not required.
Install difficulty: Easy (1 of 5). Replacement typically takes 10–15 minutes with a nut driver and requires disconnecting power at the furnace. Always shut off gas and electrical power before servicing, and if the switch trips repeatedly after replacement, have the heat exchanger and venting inspected by a licensed technician.