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The genuine Goodman 0130F00038 Auxiliary Limit Switch (identified by its light blue body for easy set-point reference) is a factory OEM safety control for the Goodman/Amana AMVC80604BXBC gas furnace. This auxiliary high-limit monitors temperature in a secondary location — commonly near the blower compartment or heat exchanger — and interrupts the heating circuit if temperatures climb beyond a safe threshold. It works alongside the primary limit to give your furnace layered over-temperature protection against airflow blockages and blower faults.
The light-blue color denotes a specific factory trip temperature. This genuine OEM Goodman switch matches that exact set point, so protection engages precisely when engineered to. Substituting a different-rated universal limit can cause nuisance trips or, worse, delayed protection. Match the OEM number and color for safety-critical components.
Easy (1 of 5). Typically 15 minutes: shut off power, note the wire positions, disconnect the two terminals, remove the mounting screws, and install the new switch in the same orientation. As with any limit trip, have a licensed HVAC technician determine the root cause before returning the furnace to service.
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