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The Goodman 10123529 is a genuine OEM manual reset high-limit switch designed for the ADVC81005CXAA furnace and compatible Goodman/Amana models. This safety control monitors furnace temperature and trips to shut off the gas valve if the unit overheats or experiences flame rollout, protecting the heat exchanger and household from unsafe conditions. Because it is a manual reset type, it must be physically reset after tripping — if your furnace repeatedly locks out on limit, the switch or an underlying airflow issue needs attention.
OEM Goodman limit switches are calibrated to the exact trip temperature specified for your furnace. A generic switch with the wrong set point can nuisance-trip or, worse, fail to cut off at the safe threshold. For a safety-critical control, always use the factory-rated OEM part.
Rating: Easy (2/5). Two mounting screws and two spade terminals; 15–20 minutes. Diagnose and correct any airflow restriction that caused the trip. Shut off gas and power before servicing.