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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for Goodman ADVC80805CNAA gas furnaces. This normally-closed switch opens the ignition/gas circuit if it senses excessive heat or flame rollout, shutting the furnace down to prevent damage and hazards. Because it is a manual reset device, it must be pressed to restore operation after a trip — a safety feature that alerts the homeowner or technician to an underlying airflow or combustion problem. A failed switch causes no-heat conditions or nuisance lockouts; this direct-fit replacement restores proper safety shutdown.
The OEM Goodman switch is calibrated to the exact trip temperature Goodman specifies for this furnace, ensuring correct safety response. Generic switches with the wrong set point may trip early or, worse, too late. For safety-critical controls, always choose OEM.
Difficulty: Moderate (⚙⚙). Remove two mounting screws, transfer the wire terminals, and mount the new switch in the same orientation. Basic tools required. Never bypass a safety switch. Disconnect power before service and diagnose the root cause of any trip.