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The Goodman/Amana 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM safety control for the AMEC801005CNAA gas furnace and compatible Goodman and Amana models. This auxiliary limit provides secondary over-temperature protection, monitoring a specific zone of the furnace and opening the control circuit if temperatures exceed a safe threshold. The light-blue cap identifies its factory-set trip temperature, so matching the exact color/rating is essential for correct protection.
OEM vs. Generic: Limit switches are calibrated to a precise trip temperature indicated by their color code. The genuine OEM 0130F00038 guarantees the correct light-blue trip point and factory mounting fit. A generic switch with a different rating can either trip prematurely (nuisance no-heat) or fail to protect at the intended temperature. For a safety control, always match the OEM specification.
Install difficulty: Easy (2/5). Cut power to the furnace, remove the mounting screws, transfer the wire leads, and remount the new switch in the same orientation. A typical 15-minute repair. If the switch has been tripping, diagnose the underlying airflow or overheating issue before returning the furnace to service — and use a licensed HVAC technician when unsure.