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The genuine Goodman 0130F00038 auxiliary limit switch is a factory safety control for the Amana/Goodman AMEH800603BXAA gas furnace. This light-blue coded thermal cutout opens the control circuit if it senses an overheat or airflow-loss condition, shutting down the burners to protect the heat exchanger and cabinet. The color coding identifies its specific temperature trip rating.
Because this is a life-safety component, the OEM 0130F00038 is calibrated to the exact trip temperature Goodman engineered for this furnace — matched by the light-blue color code. Substituting a limit with a different rating can allow dangerous overheating or cause nuisance shutdowns. Always match OEM part and color.
Easy to moderate. Usually two mounting screws and two connectors, but correct rating verification is critical — professional service recommended.