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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety control for the Goodman/Amana AMH80604BXAA gas furnace. This normally-closed thermal switch opens the control circuit if it detects excessive temperature, protecting the heat exchanger and cabinet from overheating due to restricted airflow or blower failure. The light-blue trip rating identifies its specific temperature setpoint — match the color exactly for correct protection.
Because this is a safety-rated component, only the genuine OEM switch guarantees the correct trip and reset temperatures. A mismatched generic switch can trip nuisance or — worse — fail to trip, defeating overheat protection. Always use OEM for limit and rollout controls.
Easy (DIY-friendly) — Two-screw mount with spade terminals; 15 minutes. Cut power before servicing and verify the replacement color code matches the original.