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The Goodman 0130F00038 auxiliary limit switch is a genuine OEM secondary safety control for the ADVC81005CXBA gas furnace. Identified by its light-blue temperature coding, this snap-disc switch provides a redundant layer of overheat protection — commonly mounted near the blower compartment to guard against restricted airflow, dirty filters, or blower failure. If your furnace intermittently locks out on limit but the primary switch tests good, the auxiliary limit is the next component to check.
The OEM 0130F00038 is calibrated to the precise auxiliary trip temperature the furnace design requires. Because color coding alone doesn't guarantee an identical trip point across aftermarket brands, using OEM removes guesswork and keeps your safety chain within spec. Generic equivalents can save a few dollars but may not match reset behavior or terminal layout.
Easy (2/5). A typical swap is 15–20 minutes. De-energize the furnace and shut off gas before starting. Photograph the wiring, unscrew the switch from its bracket, transfer the spade terminals, and remount. When in doubt, use a qualified HVAC professional.