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The 0130F00038 is a genuine OEM auxiliary limit switch for the Goodman/Amana AMEC961205DNAD gas furnace. Goodman color-codes its limit switches by trip temperature, and the light blue housing identifies this auxiliary switch's specific factory rating. The auxiliary limit provides secondary over-temperature protection — typically monitoring the blower compartment or a secondary heat zone — and opens the circuit to cut the burners if temperatures exceed safe levels due to airflow restriction or blower issues.
The auxiliary limit is a safety device, so the color-coded OEM part matters. The genuine light-blue 0130F00038 is calibrated to the precise temperature this furnace was engineered for. A mismatched replacement can allow unsafe overheating or trigger false lockouts. Always match the OEM color and part number.
Rating: Easy to Moderate. The auxiliary limit mounts with two screws and connects via two spade terminals. Replacement is quick with the access panel removed. Always disconnect power first and verify the color/part number against the original before installing.