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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch, identified by its light-blue housing, for the AMH80805CXBA and related Goodman/Amana furnaces. This secondary high-limit control provides an added layer of overheat protection — typically monitoring the blower compartment or a secondary heat zone — and opens the burner circuit if temperatures exceed the safe threshold. The blue color code corresponds to a specific trip rating, so matching the exact part ensures the furnace's safety logic behaves as designed.
Auxiliary limits are color-coded to a precise trip temperature. This factory OEM Goodman switch guarantees you install the correct rating rather than guessing with a generic equivalent — critical on a safety device where the wrong trip point defeats the protection.
Easy (1 of 5). Two mounting screws and two spade terminals. Cut power and gas before servicing, and confirm the blue color/rating matches the switch you removed.