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The 0130F00038 is a genuine OEM auxiliary high-limit switch, identified by its light blue trip-temperature marking, for the Goodman/Amana AMS81405DNBC gas furnace. This thermally-activated safety switch opens the control circuit if furnace temperatures exceed the design limit — protecting the heat exchanger and cabinet from overheating due to restricted airflow, a failed blower, or a dirty filter. When this switch trips or fails open, the furnace will not fire or will shut down on a limit fault.
The genuine Goodman OEM switch is calibrated to the exact trip temperature the furnace was certified with — the light-blue code guarantees you get the right setpoint. Generic limits with the wrong trip point can nuisance-trip or, worse, fail to protect the heat exchanger. For a safety device, always match OEM.
Easy. Two mounting screws and spade connectors; about 10–15 minutes for a technician. Cut power before servicing and confirm normal operating temperatures after replacement. If the new switch trips, diagnose the underlying airflow problem — do not bypass.