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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for the AMS80603AXAA gas furnace. Unlike auto-reset limits, this manual-reset switch locks open when it detects an overheat or flame-rollout condition and must be physically reset—forcing an inspection before the furnace can run again. It is a critical last-line safety device that protects against heat-exchanger damage and unsafe operation.
The OEM 10123529 is the exact factory-spec switch with the correct trip rating and bracket for a guaranteed fit and reliable protection. Our Generic UL-listed equivalent meets the same safety function at a lower price for cost-conscious repairs.
Difficulty: Easy (2/5). Typically 15–20 minutes. Disconnect power, note and transfer the wire leads, remove the mounting screws, and install the new switch. Important: a tripped manual-reset limit often signals a deeper problem (blocked airflow, failed inducer, or cracked heat exchanger)—diagnose the root cause before returning the furnace to service.