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The Goodman 0130F00038 Auxiliary Limit Switch is a genuine OEM safety control engineered for the WGFD28115V5CXAA gas furnace and compatible Goodman/Amana models. This normally-closed thermal switch opens the control circuit if it senses excess heat inside the burner or heat-exchanger area, shutting down the burner to prevent overheating, flame rollout, and heat-exchanger damage. The light-blue housing identifies its factory temperature-trip rating, so you always get the correct set point for your unit.
Our OEM Goodman switch is calibrated to the exact factory trip and reset temperatures, guaranteeing correct safety response and preserving your equipment warranty. Aftermarket generic switches may carry a different calibration or looser tolerance, which can cause nuisance lockouts or delayed shutdown. For a life-safety component, we recommend the genuine part.
Easy (1/5). Disconnect power, unplug the two spade terminals, remove the mounting screws, and swap in the new switch. Most technicians complete the job in under 15 minutes. Because this is a safety device, verify continuity and confirm proper furnace shutdown after replacement. If you are unsure, consult a licensed HVAC technician.