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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for the AMVC80805CNBC 80% AFUE variable-speed gas furnace. This normally-closed thermal switch opens on an overheat or flame-rollout condition, shutting down the furnace until the fault is corrected and the button is manually reset. If your furnace locks out on high limit or won't relight, a tripped or failed switch is a common cause.
Limit switches are calibrated to a specific trip temperature. This OEM Goodman/Amana switch carries the exact factory temperature rating and terminal layout — critical for a safety device. Never substitute a switch with a different rating; doing so can defeat overheat protection.
Easy (2/5). Disconnect power, unplug the two terminals, remove two screws, and swap. About 15 minutes. If the new switch trips again immediately, diagnose the underlying overheat cause (airflow, blower, or heat exchanger) before running.