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This genuine Goodman/Amana 10123539 manual reset limit switch is a direct-fit safety control for the AMEC960804CNAC gas furnace and other compatible Goodman and Amana models. It monitors for overheating or flame rollout conditions and cuts power to the burners when an unsafe temperature is detected, protecting the heat exchanger and your home. Because it is a manual reset design, the switch stays open after a fault until it is physically reset — a signal that the underlying cause (blocked flue, cracked heat exchanger, or airflow restriction) should be inspected.
The genuine OEM switch is factory-calibrated to the exact trip temperature specified for your furnace, ensuring reliable safety cutout and preserving warranty coverage. Aftermarket generics may trip early (nuisance shutdowns) or late (safety risk). For a life-safety component like a rollout switch, OEM is strongly recommended.
Rated Easy — 10–15 minutes with basic tools. Cut power at the disconnect, unplug the two spade terminals, remove the mounting screws, install the new switch, reconnect, and restore power. Always confirm the fault that caused the trip before returning the unit to service.