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The 0130F00038 is a genuine Goodman auxiliary (high) limit switch engineered for the WFD18115S5CXCC gas furnace and other compatible Goodman/Amana models. This bimetal thermal safety control monitors heat-exchanger and cabinet temperature and opens the burner circuit if the furnace overheats — protecting the heat exchanger, blower assembly, and your home. The light-blue color denotes its factory-set trip point; always match the color and part number when replacing.
Our OEM Goodman switch is calibrated to the exact factory trip temperature, guaranteeing correct high-limit protection and warranty compliance. Generic universal limits require field verification of trip point and mounting and can nuisance-trip or fail to protect if mismatched. For a safety component, OEM is strongly recommended.
Easy (1/5) — Two-wire connection and two mounting screws. Requires shutting off power and gas. Most homeowners with basic tools can complete in 15 minutes; if unsure, consult a licensed HVAC technician.