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The 0130F00038 auxiliary limit switch — identified by its light-blue body — is a secondary high-temperature safety on the Goodman/Amana AMEC960803BNAC furnace. It backs up the primary limit by opening the control circuit if a specific zone (such as the blower compartment or a secondary heat-exchanger area) exceeds its rated temperature. The color code corresponds to a specific trip set point, so matching the correct switch is critical.
Auxiliary limits are color-coded to their exact set point. Installing a generic switch — or the wrong color — can cause either nuisance trips or, worse, a failure to open when it should. This genuine OEM Goodman part guarantees the factory-specified trip temperature for this furnace.
Rating: Easy (1 of 5). Two-screw bracket and two spade terminals, roughly 10–15 minutes. Shut off gas and electrical power before servicing. If the switch keeps tripping, have a licensed technician check airflow and the heat exchanger before assuming the switch is bad.