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The 0130F00038 is a genuine OEM Goodman/Amana auxiliary limit switch, identified by its light-blue marking, designed for the AMES800804BXAA gas furnace and compatible Goodman-family models. This temperature-sensitive safety switch monitors for abnormal heat buildup and opens the control circuit to shut the furnace down if temperatures exceed its rated set point — protecting the heat exchanger and cabinet from overheating caused by restricted airflow or a failed blower.
The color coding on Goodman limit switches indicates a specific trip temperature. Installing the wrong-rated generic switch can cause either nuisance trips or, worse, allow dangerous overheating. Genuine OEM guarantees the correct set point and mounting bracket for this model.
Easy. Two mounting screws and push-on terminals. Disconnect furnace power, transfer the wires, and secure the new switch. Always confirm the color/temperature rating matches the original before installing.