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The Goodman 0130F00038 Auxiliary Limit Switch (light-blue coded) is a genuine OEM safety control for the Goodman VMS80804BNAA gas furnace and compatible VMS-series models. This auxiliary rollout/limit switch is a normally-closed thermal cutoff that opens if temperatures exceed its rated trip point, de-energizing the gas valve to prevent overheating. The color code identifies its specific temperature rating, so matching the exact part is critical.
Because the trip temperature is safety-critical, only the exact OEM color-coded switch should be used. A generic limit with the wrong rating can either nuisance-trip or, worse, fail to protect the heat exchanger. Always match the light-blue OEM specification.
Easy. Disconnect power, remove the two mounting screws, transfer the wire leads, and mount the new switch. Typically under 20 minutes. Never bypass a limit switch — repeated tripping indicates airflow or heat-exchanger problems that must be diagnosed.
Genuine Goodman safety component — verify the color code and model number before ordering.