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The Goodman 10123529 is a genuine OEM manual reset limit switch engineered to protect your AMS80804BXAB gas furnace from dangerous overheating and flame rollout conditions. When temperatures at the burner box or heat exchanger exceed safe thresholds, this switch opens the control circuit and shuts down the furnace, requiring a manual reset once the fault is cleared. This makes it a critical safety component that should never be bypassed.
Genuine OEM 10123529 switches are calibrated to the exact trip temperature specified by Goodman for this furnace platform, ensuring the safety circuit responds correctly. Generic equivalents may carry a lower price but can vary in trip point and reset reliability. For a safety-critical component we strongly recommend the OEM part.
Easy (2/5). A typical replacement takes 15-20 minutes with basic hand tools. Always disconnect power at the furnace disconnect before servicing. If the switch trips repeatedly after replacement, have the heat exchanger and airflow inspected by a qualified HVAC technician.