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The Goodman 10123533 is a genuine OEM manual reset high-limit switch for the Goodman AKSS920704CXAA gas furnace. This safety control monitors heat exchanger and blower compartment temperature and opens the gas/ignition circuit if the furnace overheats — protecting against blocked airflow, dirty filters, or a failed blower. Because it is a manual reset device, it must be physically reset after a trip, alerting the homeowner that a real fault occurred rather than silently cycling.
The OEM 10123533 is calibrated to the exact trip temperature specified for this furnace. A generic switch with the wrong cutout point can either nuisance-trip or fail to protect the heat exchanger. For a safety-critical control, OEM is the safe choice.
Easy to Moderate. Power off the furnace, unplug the two spade terminals, unscrew the switch, and mount the replacement in the same orientation. A multimeter continuity check is recommended before returning the unit to service.