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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM secondary overheat control for the Goodman VDS80804BNAA furnace and compatible gas furnace models. The light-blue color code identifies its specific temperature trip rating. As an auxiliary (secondary) limit, it provides a backup thermal cutoff — typically monitoring the blower compartment or a secondary heat zone — and opens the control circuit if temperatures climb beyond safe limits due to airflow restriction or blower failure. It works alongside the primary high-limit to keep the furnace within safe operating ranges.
Because auxiliary limits are calibrated to a precise trip temperature, the light-blue code must be matched exactly. A generic substitute with a different rating can bypass the intended safety margin or cause repeated nuisance lockouts. This factory OEM switch ensures the correct calibration and mounting for the VDS80804BNAA.
Easy. Cut power, remove the mounting screws, transfer the spade terminals, and install. Typical time is 10–15 minutes. Address any underlying airflow problem so the replacement doesn't trip for the same cause.
Inspected and fitment-guaranteed for the VDS80804BNAA and listed compatible models.