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The Goodman 0130F00038 Auxiliary Limit Switch (identified by its light-blue marking) is a genuine OEM safety control for the AMVC80804CNBC furnace and related Goodman/Amana models. This thermal limit monitors temperature at a secondary location in the furnace and opens the circuit to shut off the burners if it detects an overheat condition — protecting the heat exchanger and blower housing from heat damage caused by restricted airflow or a failed blower.
The Genuine OEM switch is calibrated to the exact cut-out/cut-in temperature your furnace's control sequence expects. The color code prevents installing the wrong-temperature limit. Generic substitutes with incorrect trip points can cause nuisance shutdowns or, worse, fail to protect the equipment. Match the color and part number exactly.
Easy (DIY-friendly). Two mounting screws and push-on spade terminals. Cut power before servicing. Estimated time: 10–15 minutes.