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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for Goodman and Amana AMS80604BXAB 80% single-stage gas furnaces. This normally-closed switch opens the ignition circuit if it senses an over-temperature condition — such as a blocked flue, failed blower, or flame rollout — and requires a manual button press to reset, ensuring a technician inspects the fault before the furnace fires again.
Safety limits must trip at the exact factory temperature setpoint. Goodman OEM switches are calibrated to the AMS80604 heat exchanger's rated limits; a mismatched generic switch can trip early (nuisance shutdowns) or too late (a genuine safety risk). Always use the OEM-spec control for safety devices.
Easy (2 of 5). Typically two spade terminals and one or two mounting screws. Disconnect power and gas before servicing, and diagnose the root cause of any trip — a manual-reset limit that opens indicates a real fault, not a bad switch. When in doubt, call a licensed HVAC technician.
Fits Goodman and Amana furnaces on the AMS80604 platform. Verify your model and part number before ordering.