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The Goodman 10123533 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for the AMS950904CXA gas furnace. This normally-closed switch opens the ignition/gas circuit if it senses an overtemperature or flame-rollout condition, shutting the furnace down to protect the heat exchanger and cabinet. Because it is a manual reset device, it will not automatically re-close — a tripped switch signals a real fault (blocked airflow, cracked heat exchanger, or rollout) that should be investigated before resetting.
Generic limit switches often carry a different trip temperature than the factory unit. Installing the wrong trip point either causes nuisance shutdowns or — worse — fails to trip when it should, defeating a critical safety function. This genuine Goodman OEM switch carries the exact factory-calibrated setpoint for your model.
Easy (2/5). Two spade terminals and one or two mounting screws. Shut off power and gas, note wire positions, swap the switch, and press the reset button. If the new switch trips again, do not bypass it — diagnose the underlying overheat condition.