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The Goodman B1370145 is a genuine OEM 300°F flame rollout limit switch for the Goodman GDS80703ANA gas furnace. Mounted on the burner assembly, this manual-reset safety control opens the gas valve circuit if flames roll out of the burner box — a critical protection against overheating caused by a blocked heat exchanger, restricted venting, or inadequate combustion air. A tripped or failed rollout switch will lock the furnace out on a no-heat safety fault.
This factory Goodman switch is calibrated to the exact 300°F trip point and bracket geometry your burner assembly requires. Substituting a generic limit with the wrong temperature rating or mounting can defeat the safety function or cause nuisance trips. As a life-safety component, OEM specification is strongly recommended.
Easy (2/5). Shut off gas and electrical power, disconnect the two spade terminals, remove the mounting screws, install the new switch in the same orientation, and reconnect. If the old switch had tripped, always diagnose and correct the root cause (venting, heat exchanger, airflow) before returning the furnace to service.