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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a factory secondary overheat safety control for the ADSS801005CXAC gas furnace. The color-coded snap-disc opens the control circuit if temperatures exceed its setpoint in the blower or burner area, protecting the furnace when the primary limit or airflow is compromised. The light-blue cap identifies its specific trip temperature — using the matching color is essential.
The OEM 0130F00038 is factory-calibrated to the exact light-blue trip point your furnace requires. Substituting a different color or generic disc changes the protection threshold and can cause nuisance trips or unsafe operation. Match the OEM color-coded part.
Easy. Mounts with screws and spade connectors. Disconnect power, confirm the replacement matches the light-blue rating and terminal orientation of the original, and test furnace cycling afterward.