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The genuine OEM Goodman 1370913S Primary Limit Switch is a factory-spec safety control designed for the GSU060-3 gas furnace and compatible Goodman/Amana models. This normally-closed high-limit switch protects your furnace by cutting power to the burners if the heat exchanger temperature exceeds its 200°F trip point, preventing overheating and dangerous operation. If your furnace short-cycles, overheats, or trips on limit, this is a common replacement part.
This is the genuine OEM Goodman part, guaranteeing the exact trip temperature and mounting geometry your furnace was engineered for. Generic aftermarket limit switches may have different set points or probe lengths that can cause nuisance trips or fail to protect the heat exchanger. For a safety-critical component, we recommend OEM.
Easy (★★☆☆☆). Replacement typically takes 15–20 minutes with a nut driver and takes two quarter-inch spade wires. Always shut off power and gas at the furnace before servicing. If you are uncomfortable working around gas appliances, consult a licensed HVAC technician.