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The Goodman 0130F00038 Auxiliary Limit Switch (identified by its light blue body) is a genuine OEM secondary safety cutoff. Auxiliary limits guard specific zones of the furnace — such as the blower deck or burner area — and open the control circuit to shut down heating if a localized overheat or flame-rollout condition occurs. It is a direct-fit component for the AMVC960804CNAA modulating variable-speed 96% AFUE gas furnace.
The light-blue color designates a precise factory trip temperature. Installing the wrong-temperature switch defeats the safety design — it may nuisance-trip or fail to protect against rollout. Always match the exact OEM part and color code; generic substitutes are not recommended for safety controls.
Easy (2/5). Disconnect the two spade wires, remove the mounting screws, and install the replacement in the same orientation. Cut gas and electrical power before servicing.
Fitment note: Confirm the color code and terminal orientation match your original switch before ordering.