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OEM part number 10123533 is the manual-reset high-limit safety switch for the Goodman/Amana AMVC951155DXAE 96% AFUE gas furnace. This normally-closed thermal switch opens and cuts power to the gas valve if it senses an overheat or flame-rollout condition — protecting the heat exchanger, cabinet, and home from unsafe temperatures. Unlike an auto-reset limit, the manual-reset design stays open until physically reset, so a tripped switch flags a real fault that should be investigated. When the switch itself fails open or won't reset, the furnace won't fire, and the correct OEM replacement restores safe operation.
Limit switches are calibrated to a specific trip temperature and mounting footprint. A generic switch with the wrong setpoint or terminal orientation can nuisance-trip or, worse, fail to open when it should — defeating a critical safety function. The genuine 10123533 carries the exact factory trip rating and bracket for the AMVC951155DXAE, ensuring the furnace protects itself as designed.
Easy (2 of 5). Roughly a 15–20 minute repair. Shut off power and gas, disconnect the two wire leads, remove the mounting screws, and install the new switch in the same orientation. Important: if a limit switch tripped, diagnose the underlying cause (blocked airflow, dirty filter, failed blower, or cracked heat exchanger) before returning the furnace to service — a tripped safety is a symptom, not the root problem.