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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for the ADVC80603BXBB gas furnace. This normally-closed switch opens and shuts down the burners if it senses an overheat or flame-rollout condition, then requires a manual reset — a deliberate design that flags a real problem (blocked airflow, dirty filter, cracked heat exchanger) rather than silently cycling. If your furnace locks out on heat and won't restart without pressing a button, this switch is doing its job or has failed open.
This genuine OEM switch is calibrated to the exact trip temperature Goodman engineered for this furnace. A generic switch with the wrong set point either nuisance-trips or, worse, fails to protect against a genuine overheat. On a safety device, never substitute — use OEM.
Easy to Moderate. Power off, disconnect the two spade terminals, unscrew the switch, and mount the replacement in the same location. 15–20 minutes with a nut driver. If it trips again after replacement, have a technician diagnose the underlying airflow or heat-exchanger issue.