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The Goodman 10123535 Manual Reset Limit Switch (Red) is a genuine OEM high-temperature safety limit for the AMEH960805CXAA gas furnace. The red button designates a specific trip-temperature rating, and this normally-closed switch opens the control circuit on an over-temperature or flame-rollout condition to shut the burners down and protect the heat exchanger. As a manual-reset device, it stays open until the button is pressed — a trip indicates a real fault (restricted airflow, blocked flue, or rollout) that must be diagnosed before reset.
Color-coded reset buttons correspond to distinct trip setpoints, so it is critical to match the exact OEM part. The OEM 10123535 guarantees the correct calibration for this model. A mismatched generic switch may trip early or fail to protect the equipment during a genuine over-temp event.
Easy — Two mounting screws and two spade terminals; power off, note wiring, swap, and reset. Confirm you are installing the matching red-button rating and always identify the root cause of any trip before restoring heat.