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The Goodman 10123537 is a genuine OEM gray manual reset high-limit switch for the Amana/Goodman AMVC950704CXAD variable-speed 95% AFUE condensing gas furnace. The gray body denotes a specific factory trip temperature, so this switch is not interchangeable with other color-coded limits (such as the 10123533) even when they look similar. It's a normally-closed thermal safety that opens the ignition/gas control circuit on an overheat, guarding against heat-exchanger damage and fire from restricted airflow.
Because trip calibration is safety-critical and encoded by the gray color, we recommend only the OEM 10123537. Match the color of your old switch exactly — installing the wrong temperature rating risks nuisance lockouts or an unprotected heat exchanger.
Easy (2/5). Disconnect power, photograph the wiring, remove the mounting screws, move the spade connectors to the new gray switch, and reinstall. Diagnose and fix the underlying overheat cause (dirty filter, weak blower, closed vents) before returning the furnace to service.