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The Goodman 10123533 Manual Reset Limit Switch is a genuine OEM safety control for AMVC950704CXAC variable-speed modulating gas furnaces and compatible Goodman/Amana models. This high-limit switch monitors heat-exchanger and cabinet temperature and opens the circuit if the furnace overheats — typically from restricted airflow, a dirty filter, or blower failure. Because it is a manual-reset device, it requires a deliberate button press to restore operation, ensuring a technician verifies the fault before the furnace fires again.
This factory Goodman switch is calibrated to the exact trip temperature specified for your heat exchanger. Generic limit switches may trip at the wrong setpoint — either nuisance-tripping during normal operation or, worse, failing to protect against a real overheat condition. OEM calibration is a safety-critical match you should not compromise.
Moderate (2/5). Two wire connections and one or two mounting screws, but placement on the heat exchanger must match factory orientation. Power and gas must be off, and the underlying cause of any trip (airflow, blower, filter) should be diagnosed and corrected before returning the furnace to service.
This is a safety component — if you are not comfortable diagnosing an overheat fault, have a licensed HVAC technician perform the replacement.