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The Goodman 10123532 is a genuine OEM manual-reset high-limit safety switch engineered for the WGGE4336A045MAB gas furnace and compatible Goodman/Amana models. This normally-closed limit interrupts the gas valve and burner circuit if the heat exchanger overheats, protecting the furnace from unsafe operating temperatures. Because it is a manual reset device, it will not auto-cycle after a fault — the red button must be pressed by a technician once the underlying cause (blocked airflow, failed blower, dirty filter) is corrected.
The genuine OEM 10123532 is calibrated to the exact trip temperature specified by Goodman for this furnace, ensuring proper safety response and warranty compliance. Generic aftermarket limits may carry a lower price but often use looser temperature tolerances that can cause nuisance lockouts or, worse, fail to open at the correct setpoint. For a life-safety component, OEM is the recommended choice.
Easy (2/5). Two mounting screws and two quick-connect terminals. Always shut off power and gas before servicing. If you are unsure why the limit tripped, have a licensed HVAC technician diagnose the root cause before resetting.