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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for the AMH80703AXCA 80% AFUE gas furnace and compatible Goodman/Amana models. This normally-closed switch monitors for abnormal heat or flame rollout; if it senses an over-temperature condition it opens the circuit and shuts down the furnace, requiring a manual reset button press before the unit can restart — a deliberate safety feature that flags a fault for inspection.
The genuine OEM 10123529 is calibrated to the exact trip temperature and terminal configuration specified for this furnace. Because this is a life-safety component guarding against flame rollout and overheating, a mismatched generic switch with the wrong trip point can either nuisance-trip or, worse, fail to protect. Always use OEM for safety controls.
Moderate (2/5) — Two spade terminals and a mounting bracket; a multimeter helps verify continuity. Turn off gas and power before servicing, and diagnose the root cause of any trip before replacing.