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The Goodman 0130F00036 Limit Switch (identified by its pink housing) is a genuine OEM high-limit safety control engineered for the WFD18090S4BXCC gas furnace and compatible Goodman/Amana models. This component continuously monitors heat-exchanger temperature and interrupts the burner circuit if the furnace overheats, protecting your equipment and home from unsafe conditions. A failed or drifting limit switch is a common cause of short-cycling, no-heat calls, and nuisance lockouts.
Our OEM option is the exact factory-specified switch with the correct trip and reset temperatures for guaranteed fit and safety compliance. The Generic option is a quality-tested equivalent offering the same electrical ratings at a lower price point. For a safety limit control we recommend OEM to preserve the factory temperature calibration.
Easy (1/5). Two-wire spade-terminal connection and a two-screw mount. Most homeowners can swap this part in under 15 minutes with a nut driver. Always disconnect power at the furnace switch and breaker before servicing. If you are unsure why the original tripped, have a licensed HVAC technician inspect for underlying airflow or heat-exchanger issues.