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The Goodman 10123533 Manual Reset Limit Switch is a genuine OEM high-limit safety control for the AMH950904CXAB gas furnace. This switch monitors temperature and opens the circuit to shut down the furnace if it overheats — protecting the heat exchanger from damage and preventing unsafe operation. The manual-reset design requires a technician to press the button to restore heat, prompting inspection of the underlying cause (such as a dirty filter or blocked airflow).
Limit switches are calibrated to a specific trip temperature. A generic switch with the wrong setpoint can nuisance-trip or, worse, fail to open when needed. The genuine OEM 10123533 is set to the factory temperature rating for reliable, safe protection of your specific furnace model.
Moderate (2/5) — Two spade terminals and mounting screws; wiring is straightforward but this is a safety control, so correct placement matters. De-energize the furnace before servicing and confirm the switch resets and reads continuity after install.