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The Goodman 10123518 is a genuine OEM manual reset high-limit switch for the Amana/Goodman AMVC950453BXAC high-efficiency gas furnace. This safety device opens the control circuit when it senses excessive temperature — from a failed blower, blocked airflow, or a flame rollout condition — shutting the furnace down to prevent heat-exchanger damage and fire hazard. Because it is a manual reset, it must be pressed to restore operation, alerting the homeowner that a fault occurred.
Limit switches are calibrated to a specific trip temperature. A generic switch with a different setpoint can nuisance-trip or, worse, fail to open when it should. This OEM Goodman 10123518 carries the exact factory trip rating and mounting footprint, ensuring the furnace's designed safety response and a bolt-in fit.
Moderate (2/5) — Two mounting screws and two spade terminals; label wiring before removal. About 15–20 minutes. Shut off power and gas first, and diagnose the root cause of any trip before returning the unit to service.