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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for the ADVC80603BNAA gas furnace. This switch opens the control circuit if the heat exchanger or plenum temperature exceeds its rated trip point, shutting down the burners to prevent overheating. Unlike an auto-reset switch, the manual reset button must be pressed to restore operation — a deliberate design that flags a recurring fault such as restricted airflow or a failed blower.
This genuine Goodman OEM switch is calibrated to the exact trip temperature the furnace's engineering requires. Generic switches with the wrong set point can nuisance-trip or, worse, fail to trip when needed. On a safety limit control, matching the OEM rating is essential.
Easy to Moderate — Cut power, remove two mounting screws, transfer the wire terminals, and mount the new switch. A multimeter is helpful to confirm continuity. Always diagnose the root cause of a tripped limit before replacing it.