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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety control for the Goodman/Amana ADVC81005CXBB gas furnace. The light-blue color code marks its factory-specific trip temperature. As an auxiliary limit, this switch provides secondary overheat protection — commonly guarding the blower compartment or a specific zone of the cabinet — and opens the control circuit if that area exceeds safe temperatures, backing up the primary high-limit switch.
Like all Goodman limit switches, the light-blue color code designates a precise calibration. A genuine Goodman OEM auxiliary switch ensures the correct trip point and reliable secondary protection. Generic switches with mismatched setpoints can cause false trips or compromise the furnace's layered safety design — always match the color code.
Easy (2/5). Two-wire spade connection with a single mounting point; about 15 minutes with power disconnected. Persistent tripping usually indicates an airflow or blower fault that a technician should investigate.
Always disconnect power before servicing. Match the light-blue color code when replacing.