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The Goodman/Amana 0130F00038 Auxiliary Limit Switch — identified by its light blue color code — is a genuine OEM secondary safety control for AMEC960402BNAC gas furnaces and compatible Goodman and Amana equipment. Typically mounted in the blower compartment or on the heat-exchanger panel, this switch backs up the primary limit by cutting the burner circuit if temperature rises abnormally in its location, guarding against overheating caused by airflow loss or blower failure.
The light blue body denotes a specific factory trip temperature, so it is important to match the color/spec exactly. A failed auxiliary limit can cause no-heat lockouts or, if bypassed, an unsafe furnace. Replacing it with the correct OEM part keeps every layer of the furnace's safety chain intact.
OEM vs. Generic: Auxiliary limits are color-coded to precise trip points. Our OEM 0130F00038 delivers the exact light-blue set point this furnace requires. Generic substitutes with the wrong temperature rating can nuisance-trip or fail to protect the equipment. OEM is recommended for all safety limits.
Install Difficulty: Easy (⭐⭐☆☆☆). Disconnect power, remove the mounting screws and spade connectors, and install the replacement in the same orientation. If it had tripped, restore proper airflow before returning the furnace to service.