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The Goodman 10123533 is a genuine OEM manual reset limit switch built as a direct-fit replacement for the AMS950704CXA gas furnace. This thermally activated safety control monitors temperature at the heat exchanger or burner area and opens the circuit to shut down the furnace if it detects an overheat or flame-rollout condition. Because it must be manually reset after a trip, it flags a serious safety event to the homeowner rather than silently cycling — a critical protection against cracked heat exchangers, blocked airflow, and blocked flues.
OEM vs. Generic: The 10123533 is calibrated to the exact trip temperature and mounting footprint specified for this furnace. Substituting a generic switch with a different setpoint or terminal layout can defeat the safety function or cause nuisance trips. For any burner-side safety control, always install the genuine OEM part matched to your model.
Install difficulty: Easy to moderate. Shut off gas and power, note and disconnect the wiring, unscrew the old switch, mount the new 10123533 in the same orientation, and reconnect. Typically 15–20 minutes. If the switch keeps tripping after replacement, investigate airflow and heat-exchanger issues before repeated resets. Confirm compatibility with your unit before ordering.