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The genuine OEM Goodman 10123535 is a manual reset high-limit / flame rollout safety switch identified by its red button, indicating a distinct trip temperature from the companion 10123533 unit. It is designed for the Amana AMH950703BXAC 96% AFUE gas furnace and related Goodman/Amana models. Mounted near the burner assembly or heat exchanger, it interrupts the ignition circuit when temperatures exceed the safe limit, then holds the furnace off until a technician manually resets it.
Color coding on Goodman rollout switches corresponds to precise trip temperatures — using the wrong-rated generic switch can produce false lockouts or bypass a genuine safety condition. The OEM 10123535 guarantees the correct cutout point and factory mounting fit. Match the button color and part number exactly; do not substitute the 10123533 for this position.
Rated Easy (2/5). Disconnect power, remove the mounting screws, transfer the two spade terminals, and reinstall in the same orientation. A repeatedly tripping red-button switch almost always signals a combustion or venting fault — inspect the flue, burners, and heat exchanger before returning the furnace to service.