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The Goodman B1370154 Rollout Limit Switch is a genuine OEM flame-rollout safety control rated at 350°F for the GMPV125-5 gas furnace. Mounted near the burner assembly, it senses abnormal heat caused by flame rollout — a dangerous condition where flames escape the heat exchanger. When tripped, it cuts power to the gas valve to prevent overheating and fire. This is a manual-reset safety device that should never be bypassed.
The OEM B1370154 is factory-calibrated to the exact 350°F trip point and matches Goodman's mounting bracket and terminal spacing. A generic switch with the wrong temperature rating can trip early (nuisance shutdowns) or too late (unsafe). For a rollout safety switch, always install the OEM-rated part.
Easy (1 of 5). Turn off power and gas, unplug the two wire terminals, remove the mounting screw, and install the replacement. If a rollout switch has tripped, always diagnose the root cause (blocked heat exchanger or venting) before returning the furnace to service.