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The Goodman B1370145 Rollout Limit Switch is a genuine OEM flame-rollout safety control engineered for the AMH80905CNAB furnace and other compatible Goodman/Amana gas furnaces. Mounted at the burner box, this manual-reset switch opens the ignition circuit the instant it senses flame rollout or overheating outside the heat exchanger, shutting the furnace down before a hazardous condition can develop. It is a critical life-safety component — always replace it with a genuine OEM part rated to the correct temperature.
Our OEM Goodman B1370145 matches the factory trip point and bracket geometry exactly, so it seats in the original clip and trips at the certified 300°F threshold. Generic universal rollout switches often use a different temperature rating or terminal orientation, which can cause nuisance trips — or worse, fail to trip when they should. For a safety device, we recommend OEM every time.
Easy (2/5). Cut power at the disconnect, unplug the two spade terminals, remove the mounting screw, and swap in the new switch. Typically a 10–15 minute repair with a nut driver. If the switch has tripped, always inspect for the root cause — a cracked heat exchanger, blocked flue, or failing inducer — before returning the furnace to service.