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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch identified by its light blue color code, built for the ADVC81005CNBB gas furnace and compatible Goodman/Amana models. This auxiliary (secondary) limit provides an additional layer of overheat protection — commonly monitoring the blower compartment or secondary heat exchanger area — and opens the control circuit if temperatures exceed safe limits. Goodman's color code system ensures you install the exact trip-temperature rating your furnace requires.
The genuine OEM Goodman switch is factory-set to the light-blue trip temperature. Substituting a different color code or a generic switch changes the set point and can either cause nuisance shutdowns or compromise safety. Match the OEM light-blue code every time.
Easy (1/5). Two spade terminals and mounting screws. Shut off power and gas before servicing, and verify the replacement matches the light-blue code. If unsure, consult a licensed HVAC technician.