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The 10123529 is a genuine OEM manual-reset high-limit switch for the Goodman/Amana AMVC80805CXAA gas furnace. This safety control monitors temperature and trips to shut off the burners if the furnace overheats — for example, from a blocked filter, failed blower, or restricted airflow. Because it's a manual-reset design, a trip requires the button to be pressed to restore operation, prompting inspection of the underlying cause. A worn or nuisance-tripping limit switch should be replaced with an exact OEM part to keep the furnace's safety chain intact.
Genuine Goodman limit switches are calibrated to the furnace's exact factory trip and reset temperatures — critical for a safety device. Generic switches with different set points can either fail to protect the heat exchanger or cause repeated nuisance trips. On a life-safety control, always use OEM.
Easy–Moderate (2/5). Disconnect power, unplug the two wire leads, remove two mounting screws, and install the replacement. Usually 15–30 minutes; if the switch tripped, diagnose the airflow issue before returning the furnace to service.