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The 0130F00038 is a genuine OEM auxiliary (rollout/high) limit switch for the Goodman/Amana AMH81405DXCE gas furnace. The light-blue housing identifies its specific factory trip temperature — using the correct color-coded switch is critical, since a mismatched rating will not protect the heat exchanger correctly. This normally-closed thermal switch opens and cuts the gas valve if the furnace exceeds its safe operating temperature, guarding against overheating from a blocked flue, dirty filter, or blower failure.
Because this is a safety component, OEM is strongly recommended. The genuine 0130F00038 is calibrated to the exact trip point the furnace was certified with. Generic switches may have different trip temperatures or bracket geometry, compromising protection. Always match the OEM color code.
Remove two mounting screws, transfer the wire connectors, and mount the new switch in the same orientation. Shut off power and gas first. Never bypass a tripping limit switch — a repeated trip signals an airflow or venting problem that must be corrected.