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The Goodman 0130F00038 Auxiliary Limit Switch (light-blue identifier) is a genuine OEM secondary temperature safety for the AMVC960403BNBA gas furnace. This auxiliary limit backs up the primary high-limit, opening the control circuit if a specific zone of the furnace — such as the blower compartment or a secondary heat-exchanger area — exceeds its safe temperature. The light-blue cap denotes its factory trip point, so matching the exact part matters for correct protection.
Color-coded limits are matched to a specific temperature. The OEM Goodman 0130F00038 guarantees the correct light-blue trip rating; a generic or wrong-color substitute can nuisance-trip or fail to protect. Always replace with the identical OEM color code.
Easy — Two screws and two spade terminals. Disconnect power, confirm the light-blue color match, and reseat firmly against its mounting surface.