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The Goodman 10123517 is a genuine OEM manual-reset limit (high-temperature safety) switch for the Goodman/Amana ACVC950915DXBA gas furnace. This normally-closed thermal switch opens the control circuit if it senses excessive heat — typically caused by a blocked flue, failed blower, or dirty filter — shutting the furnace down to prevent heat-exchanger damage or fire. Unlike auto-reset limits, it requires a manual button press to restore operation, alerting the homeowner that a fault occurred.
Trip temperature is a life-safety parameter. The OEM 10123517 is factory-set to the furnace's certified cutout temperature; generic switches with approximate trip points can either nuisance-trip or, worse, fail to protect the heat exchanger. For any safety control we recommend OEM only.
Cut power, disconnect the two spade terminals, remove the mounting screws, and install the replacement. A 10-minute repair. After replacing, diagnose and correct the underlying cause (airflow restriction) before restoring heat.