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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for AMVC80805DNBD and compatible Goodman/Amana gas furnaces. This high-limit switch monitors heat-exchanger temperature and cuts power to the gas valve if the furnace overheats, protecting against fire and component damage. Its manual reset design requires a technician to physically reset it — a deliberate safeguard that flags recurring overheating conditions.
Safety limit switches are calibrated to precise trip temperatures. An incorrectly rated generic can either nuisance-trip or fail to trip when needed. The OEM 10123529 is factory-calibrated to the AMVC80805 heat-exchanger spec for reliable, code-compliant protection.
Moderate (2/5). Two-wire connection with mounting screws. Shut off gas and power first. If the switch trips repeatedly after replacement, have a licensed technician diagnose the underlying overheating cause.