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The Goodman 20269903 is a genuine OEM auxiliary auto-reset limit switch engineered for the WGGE4360A115MAB gas furnace. This safety high-limit control monitors heat-exchanger and cabinet temperatures, opening the burner circuit if the furnace overheats and automatically re-closing once temperatures return to a safe range. It is a critical safety component — a failed limit switch is a common cause of no-heat and short-cycling complaints.
This is a factory-original Goodman part built to the exact trip temperature and mounting footprint specified for your furnace. Generic aftermarket limit switches may use a different cut-out temperature or bracket, risking nuisance trips or improper protection. For a safety control, OEM is strongly recommended.
Easy–Moderate. Typically two mounting screws and two spade terminals. Always disconnect power before service. If you are unsure of wiring, consult a licensed HVAC technician.