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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for the Goodman ADVC80905CXAA gas furnace. Unlike an auto-reset limit, this manual-reset switch stays open after a trip and must be reset by hand — a deliberate safeguard against flame roll-out or severe overheating that requires technician attention before the furnace runs again. It protects against dangerous conditions caused by blocked flue, cracked heat exchanger, or restricted airflow.
This genuine Goodman OEM switch is factory-set to the exact trip temperature required for the ADVC80905CXAA. Because a manual-reset limit is a last-line safety device, a mismatched generic rating can be genuinely hazardous — we recommend OEM only for this component.
Easy (2/5). Disconnect gas and power, remove the two mounting screws, transfer the spade terminals, and mount the new switch flush to the surface it monitors. If the limit tripped, always find and correct the root cause (airflow, flue, heat exchanger) before returning the furnace to service.