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The genuine Goodman B1370154 is a 350°F manual-reset flame rollout switch for GMPN060-3 gas furnaces. Mounted on the burner box, it opens the gas-valve/control circuit if flame rolls out of the heat exchanger — a critical safety limit that prevents fire and CO hazards. A tripped rollout is a symptom of a blocked flue, cracked heat exchanger, or dirty burners; always diagnose the root cause before replacing.
The OEM B1370154 carries Goodman's exact 350°F calibration and the correct bracket for the burner assembly. Because this is a life-safety device, an off-spec generic that trips late — or not at all — defeats its purpose. OEM is strongly recommended here.
Easy (2/5). Kill power, remove two mounting screws, transfer the two wires, and mount the new switch. Verify the underlying fault is corrected before restoring heat. 10 minutes.