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The Goodman 0130F00038 auxiliary limit switch, identified by its light-blue body coding, is a genuine OEM secondary safety control for the Amana/Goodman AMVC80704BXAA gas furnace and compatible models. This normally-closed thermal switch monitors a specific zone of the furnace and opens to interrupt the heating circuit if temperatures exceed safe limits, providing backup protection alongside the primary high-limit control. Auxiliary limits commonly guard against blower or heat-exchanger overheating.
Auxiliary limits are color-coded to a precise trip temperature, and the light-blue 0130F00038 must match the factory specification for its location in the furnace. Using the genuine OEM switch guarantees the correct open temperature and mounting fit; substituting a different-rated generic risks either nuisance trips or, worse, failing to shut down during a genuine overheat. Always match the exact OEM color-coded part.
Easy (1 of 5). This is a two-wire, single-fastener replacement. Disconnect power at the furnace switch and breaker before servicing, and confirm you are installing the same light-blue rating in the same location. If the auxiliary limit trips repeatedly, check airflow, filter condition, and blower operation — a tripping secondary limit usually signals an underlying overheating cause that also needs attention.
Genuine OEM Goodman quality for reliable, code-matched furnace safety.