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The Goodman 10123533 is a genuine OEM manual reset high-limit switch designed for the GME950603BXAA gas furnace and compatible Goodman/Amana models. This safety control monitors heat exchanger and plenum temperature and opens the circuit if the furnace overheats — typically caused by restricted airflow, a dirty filter, or a failed blower. Because it is a manual reset device, it will not automatically re-close, forcing an inspection before the furnace can run again. That deliberate lockout is what protects the heat exchanger and your home from an overheat condition.
OEM ensures the exact trip temperature, mounting footprint, and terminal orientation the furnace board expects. Generic limit switches with a different set point can nuisance-trip or, worse, fail to protect at the correct temperature. For a safety cutout, always match the OEM trip rating.
Rating: Easy (1/5). Disconnect power, remove two mounting screws, transfer the spade connectors, and reinstall. If the switch keeps tripping after replacement, diagnose the underlying airflow or blower problem rather than repeatedly resetting it.