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The Goodman 10123529 manual reset limit switch is a genuine OEM safety control for the Goodman/Amana ADVC80805CNBB gas furnace. This high-temperature limit switch protects the furnace from overheating: if the heat exchanger or plenum exceeds its safe temperature threshold, the switch opens and shuts down the burners. Unlike an auto-reset limit, the manual reset design requires pressing the button to restore operation — a deliberate safeguard that flags a fault (such as a blocked filter, failed blower, or restricted ductwork) for inspection.
The OEM Goodman 10123529 is calibrated to the exact trip temperature specified for this furnace, ensuring the safety circuit behaves as engineered. Generic limits may carry a different trip point or terminal layout, which can cause nuisance trips or fail to protect the heat exchanger. For a safety-critical control, OEM is strongly recommended.
Easy to Moderate — typically two mounting screws and quick-connect terminals after de-energizing the furnace. If the switch has tripped, always diagnose and correct the underlying overheat cause before resetting or replacing. Professional service is advised.