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The Goodman B1370145 is a genuine OEM 300°F flame rollout limit switch for GDS81155CNA gas furnaces. This manual-reset safety mounts on the burner box and trips if flames roll out of the heat exchanger, shutting down the furnace to prevent overheating and unsafe combustion. A tripped or failed rollout switch is a critical safety event — always replace it with the exact-rated OEM component.
Safety switches must match the factory trip point precisely. The genuine Goodman OEM B1370145 is calibrated to open at 300°F exactly as the furnace was certified. Generic switches with the wrong temperature rating can allow unsafe operation or cause nuisance shutdowns. For a life-safety part, only OEM is appropriate.
Easy (2 of 5). Cut power, remove two mounting screws, transfer the spade connectors, and mount the replacement. Note: never bypass a rollout switch — if the new one trips, diagnose the root cause first.