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The 10123529 is a genuine OEM manual reset high-limit switch for Goodman and Amana gas furnaces, including the AMVC80805DXCA. This safety control opens the circuit and shuts down the burners if the heat exchanger area overheats — commonly caused by a blocked filter, failed blower, or restricted ductwork. Unlike auto-reset limits, it requires a manual press to restore operation, forcing the cause of the overheat to be addressed.
The OEM 10123529 uses the factory trip temperature and terminal layout, ensuring the furnace shuts down at the exact designed threshold. Generic switches with incorrect trip points can nuisance-trip or, worse, fail to trip. This is a safety-critical component — OEM is strongly advised.
Easy (2/5). Power off, disconnect the two spade terminals, unscrew and replace the switch, then diagnose and clear the overheat cause before resetting. About 15–20 minutes with basic tools.