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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety control for the ADVC81155CXAA gas furnace and compatible Goodman/Amana models. This secondary (auxiliary) limit provides backup overheat protection — often mounted near the blower or a rollout-prone area — cutting the heating circuit if temperatures exceed safe levels. The light blue color code identifies its specific trip rating, which differs from the primary limit, so exact matching is essential.
The OEM Goodman auxiliary limit is calibrated to the precise temperature and reset behavior specified for this position in the furnace. Using a generic switch — or accidentally swapping it with the pink primary limit — can defeat a layer of safety protection or cause nuisance shutdowns. Match the OEM part and color code exactly.
Rating: Easy. Power down the furnace, note the wire and mounting orientation, disconnect the leads, and swap in the new switch. Typically completed in about 15 minutes. Recurring trips usually point to an airflow restriction rather than a faulty switch.
Restore full safety protection. Unsure which limit you need? Contact info@nationalhvacparts.com with your model and serial.