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The Goodman B1370108 Flame Rollout Switch is a genuine OEM safety control for the Goodman GUPS140-5 gas furnace and compatible models. Mounted on the burner box, this manual-reset thermal switch opens the ignition circuit if flames roll out of the combustion chamber — a critical safeguard against a blocked heat exchanger, poor draft, or dirty burners. If your furnace locks out on a rollout fault, this switch is a primary component to inspect and replace.
The genuine OEM B1370108 is calibrated to the exact 300°F trip point and terminal layout your furnace safety circuit requires. Generic switches with a different rating can trip prematurely or, worse, fail to trip when needed. Because this is a life-safety device, we strongly recommend OEM.
Difficulty: Easy (1/5). Cut power, remove the single mounting screw, transfer the two spade connectors, and reinstall. A 10-minute repair with basic tools. Important: a tripped rollout switch signals an underlying combustion problem — always diagnose and correct the root cause before returning the furnace to service.
Ships fast from National HVAC Parts. Verify your model number before ordering to ensure an exact fit.