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The genuine Goodman 0130F00038 Auxiliary Limit Switch (identified by its light-blue housing) is a factory OEM secondary safety control for the AMVC800803BNAB 80% AFUE gas furnace. This manual/auto-reset switch guards a specific zone of the furnace — such as the blower compartment or burner area — and interrupts operation if it senses excessive temperature, backing up the primary limit. It's a low-cost part that plays a critical safety role in preventing heat-exchanger damage and overheating.
The color-coded trip temperature makes exact-match sourcing essential — the OEM Goodman 0130F00038 guarantees the correct light-blue set point for your furnace. A generic or wrong-color limit can trip prematurely or fail to protect. For safety controls, always choose OEM.
Easy — cut power, remove the mounting screws, transfer the two wires, and reinstall. A quick 10–15 minute job; verify the light-blue color code matches your original before installing.