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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety control for the AMSS920403ANAA gas furnace and related Goodman/Amana models. This normally-closed thermal switch monitors temperature in the blower or burner compartment and opens the circuit if the furnace overheats, shutting down the gas valve to prevent heat-exchanger damage and fire hazards. The light-blue color code identifies its specific trip temperature—matching it exactly is critical for correct operation.
The OEM 0130F00038 is factory-calibrated to the precise trip and reset temperatures your furnace requires. Because limit switches are a life-safety device, a generic switch with the wrong set point can either nuisance-trip or fail to protect the equipment. Always match the OEM color code and part number.
Easy (1/5). Two mounting screws and two spade connectors. Disconnect power, remove the old switch, transfer the wires, and mount the replacement. Typically a 15-minute job with a nut driver.