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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch (identified by its light blue body) for the Goodman ACVM960604CXBA furnace and compatible models. This thermal safety device monitors temperature at a secondary location in the furnace and opens the circuit if it detects an overheat condition — caused by restricted airflow, a dirty filter, or blower failure — shutting down the burner to protect the heat exchanger and cabinet. The color code corresponds to its specific factory trip temperature.
Because the trip temperature is safety-critical, the genuine Goodman OEM switch is strongly recommended — the light-blue color code guarantees the correct factory set point. Generic substitutes with the wrong temperature rating can either nuisance-trip or fail to protect against a genuine overheat, which is a fire-safety risk. Match the OEM part exactly.
Easy–Moderate (2/5). Remove the mounting screws, transfer the spade connectors, and secure the new switch. About 15 minutes. Confirm the replacement color/temperature code matches the original, and disconnect power and gas before servicing.