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The Goodman 10123517 Manual Reset Limit Switch is a genuine OEM high-temperature safety cutout for the ACVC950915DXAC gas furnace. Unlike auto-reset limits, a manual-reset switch latches open when it detects an overtemperature or flame-rollout condition and must be physically reset by pressing its button — by design, so a technician inspects the furnace before it fires again. If your furnace trips and won't restart until reset, this switch is doing its job; if it trips repeatedly or stays open, it may need replacement.
This genuine OEM switch is calibrated to the exact trip temperature engineered for your furnace's burner compartment. Because it's a flame-safety device, a generic with the wrong setpoint can fail to protect against rollout or nuisance-trip during normal operation. For combustion safety, install the factory-matched part.
Easy (1 of 5). About 15 minutes. Disconnect power and gas, photograph the wiring, remove the spade connectors and mounting screws, and install the new switch in the same position and orientation. Important: if the original switch tripped, diagnose the root cause (blocked flue, dirty burners, failing inducer) before returning the furnace to service — a repeatedly tripping rollout switch signals a combustion problem that needs attention.