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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch — identified by its light-blue body — built as a direct-fit replacement for the Amana/Goodman AMEC960402BNAB gas furnace. This secondary safety control opens the circuit if it senses abnormal heat in the blower or burner area, preventing overheating and rollout conditions. A tripped or failed auxiliary limit will prevent the furnace from running.
The color coding on Goodman limit switches indicates a specific trip temperature — the light-blue 0130F00038 is calibrated to an exact set point. Installing a generic or wrong-color limit can cause nuisance shutdowns or defeat the safety function. Always match OEM for safety controls.
Easy. Disconnect power, remove the panel, unclip two wires, and unscrew the switch. About 10–15 minutes. Confirm you are replacing with the matching light-blue part.