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The Goodman 10123534 Manual Reset Limit Switch is the genuine OEM high-temperature safety control for the ACV90704CXBB gas furnace and compatible Goodman/Amana models. This switch protects your furnace and home by cutting power to the gas valve if the heat exchanger or burner area exceeds safe temperatures. Because it is a manual reset device, it stays tripped until you press the button — a deliberate design that flags a serious airflow or overheating condition rather than silently resetting.
The genuine OEM switch is calibrated to the precise trip temperature specified for your furnace. A generic switch with the wrong setpoint can either nuisance-trip or, worse, fail to trip when it should — a real safety hazard. For a safety component, always choose OEM.
Easy to Moderate (2 of 5). A 15-minute swap with a nut driver, but diagnose the root cause first — a tripped limit switch is a symptom of restricted airflow, a dirty filter, or a blower issue. Power off before servicing. If it trips again after replacement, call a licensed HVAC technician.
Keep your furnace's safety chain intact with the exact switch Goodman specified.