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The Goodman 0130F00038 Auxiliary Limit Switch (light blue color-coded) is a genuine OEM safety control for the ADVC80603BNBA furnace and compatible Goodman/Amana models. Mounted as a secondary high-limit, this normally-closed thermal switch provides an additional layer of over-temperature protection, opening the control circuit and shutting down the burner if temperatures in its zone exceed the factory setpoint. The light blue color code marks its specific trip temperature, which differs from the primary (pink) limit — always match color and part number.
The genuine OEM 0130F00038 is calibrated to the exact auxiliary trip temperature your furnace's safety logic expects. A generic substitute with the wrong setpoint can cause nuisance lockouts or fail to protect the unit. For a safety component, the small savings on a generic part is not worth the risk — stick with OEM.
Difficulty: Easy (1/5). This is a two-screw, two-terminal swap. Cut power at the disconnect, photograph the wiring, remove the mounting screws, transfer the wires to the new switch in the same orientation, and remount. Typical replacement time is 10–15 minutes with a nut driver and needle-nose pliers. If the auxiliary limit tripped repeatedly, have a technician diagnose the underlying airflow or heat cause before restarting.