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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM thermal safety cutout for Goodman and Amana gas furnaces, including the AMVC800805DNAA. It opens the ignition circuit if it detects abnormal heat — such as flame rollout or a blocked heat exchanger — and stays open until manually reset, preventing unsafe re-firing.
The OEM 10123529 is calibrated to the exact trip temperature your furnace's safety certification requires. Generic switches with the wrong set point can nuisance-trip in normal operation or — worse — fail to trip during a real fault. This is a life-safety component; we strongly recommend OEM.
Easy–Moderate (2/5). Shut off power and gas, unplug the two spade terminals, remove the mounting screws, and swap. A repeatedly tripping switch usually signals an underlying airflow or combustion problem that should be diagnosed, not just reset.
Genuine Goodman/Amana part. Fit questions? info@nationalhvacparts.com.