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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control designed for the AMH80704BXCB 80% AFUE gas furnace and other compatible Goodman and Amana models. This rollout/high-limit switch monitors for abnormal heat conditions and interrupts the burner circuit to prevent overheating. Because it is a manual reset device, it must be pressed to restore operation after a trip — a deliberate design that alerts homeowners to underlying combustion or airflow problems.
The genuine OEM 10123529 is calibrated to the exact trip temperature specified by Goodman engineering, ensuring your furnace's factory safety margins are preserved. Aftermarket substitutes may trip at incorrect temperatures, causing nuisance shutdowns or failing to protect the heat exchanger. For a critical safety component, OEM is strongly recommended.
Easy — DIY friendly (10–15 minutes). Disconnect power, unplug the two spade terminals, remove two mounting screws, and swap. No refrigerant or gas-line work required. Always shut off power at the furnace disconnect before servicing.