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The Goodman 10123529 Manual Reset Rollout Limit Switch is a genuine OEM safety control engineered for ADSS800403AXAC gas furnaces and compatible Goodman/Amana 80% AFUE models. Mounted near the burner assembly, it senses abnormal heat caused by flame rollout and opens the control circuit to shut down the furnace before damage or a hazard occurs. Because it is a manual reset device, it must be reset by hand after a fault is corrected — a deliberate safeguard that forces a technician to inspect the cause rather than let the furnace cycle repeatedly.
OEM vs. Generic: This is a factory OEM Goodman part built to the exact trip temperature and terminal spacing your furnace's control board expects. Universal aftermarket rollout switches often trip at the wrong setpoint, causing nuisance lockouts or — worse — failing to protect the heat exchanger. For a safety component, we strongly recommend the OEM part.
Install difficulty: Easy (⭐⭐☆☆☆). Cut power, disconnect the two spade terminals, remove the mounting screw, and reverse. Most homeowners with a multimeter can replace this in under 15 minutes. Always confirm the flame-rollout cause before returning the furnace to service.