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The Goodman 0130F00038 Auxiliary Limit Switch (light-blue body) is a genuine OEM secondary safety control for the VMS80604BXAA 80% AFUE gas furnace. The color code identifies its specific trip temperature — this auxiliary limit backs up the primary high-limit, opening the control circuit if a localized area of the furnace exceeds its safe temperature. It protects against blocked airflow, blower failure, and heat build-up around the blower compartment or burner box.
The OEM 0130F00038 is matched to the exact trip point the light-blue code represents — critical, because auxiliary limits differ only by temperature rating and are easy to mis-order. Installing a generic switch with the wrong color/temperature rating causes nuisance trips or defeats the safety entirely. Always match the OEM part by color to guarantee correct protection.
Easy (2 of 5). About 15 minutes. Shut off power and gas, photograph the wiring, unclip or unscrew the old switch, transfer the leads, and mount the new limit in the same location. Confirm normal heating operation afterward.
Compatible with the Goodman VMS80604BXAA. Genuine OEM replacement part — verify the light-blue temperature code matches.