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The Goodman 10123535 is a genuine OEM red-button manual reset limit switch for the Goodman AKSS920704CXAA gas furnace. The distinctive red reset button typically designates a higher trip-temperature or secondary limit location versus the standard switch, giving a second layer of over-temperature protection for the heat exchanger and blower housing. When tripped, it must be manually reset, signaling that the furnace experienced a genuine overheat condition.
The OEM 10123535 is matched to the exact trip point and terminal layout for this furnace. Note that the red and standard limit switches on this model are not interchangeable — installing the wrong trip temperature compromises safety. Always match the OEM number.
Easy to Moderate. Cut power, disconnect the terminals, swap the switch in the same mounting position and orientation, and verify continuity with a meter before restoring power.