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The Goodman 10123532 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for the Goodman WGGE4348A115MAB furnace. This switch opens the gas/ignition circuit if the furnace overheats and stays open until manually reset — protecting the heat exchanger and household from dangerous over-temperature conditions caused by restricted airflow or a failed blower.
Limit switches are safety-critical and must trip at the exact factory temperature rating. The OEM 10123532 is calibrated to Goodman's specification, ensuring the furnace shuts down at the correct threshold. Generic switches with the wrong trip point can either nuisance-trip or fail to protect the heat exchanger — a serious safety risk.
Easy — Turn off power, disconnect the two spade terminals, remove the mounting screws, and install the new switch in the same orientation. A repeated trip after replacement indicates an underlying airflow problem that should be diagnosed by a technician.