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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is the genuine OEM secondary overheat-protection switch for the AMVC961005DNBA furnace. Mounted on the blower deck or near the burner box, it provides a backup high-temperature cutout — de-energizing the furnace if the primary limit is bypassed or a localized overheat condition develops. The light-blue marking identifies its factory trip temperature.
Because the auxiliary limit is a life-safety component with a specific calibrated trip point, the color code is critical. Generic substitutes may trip at the wrong temperature or fail to fit the OEM bracket. The factory 0130F00038 ensures the correct light-blue trip value and proper mounting.
Easy (2/5) — Two screws and spade terminals. Kill power before service. Confirm blower operation and airflow, as repeated auxiliary trips usually indicate an airflow or blower fault.