IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman 10728342 is a genuine OEM high-limit safety switch for the WGGE4324A045MAB gas furnace. Mounted on the heat exchanger or burner box, it monitors plenum temperature and opens the control circuit if the furnace overheats — typically from restricted airflow, a dirty filter, or blower failure. When it trips, the burners shut down while the blower continues cooling the exchanger. If your furnace short-cycles on heat or fails to fire, a faulty limit switch is a common cause.
Each limit switch is calibrated to a specific trip temperature and physical mount. The genuine Goodman 10728342 opens at the factory-specified setpoint, giving reliable overheat protection without nuisance trips. Generic switches with the wrong rating can either shut the furnace down prematurely or fail to protect the heat exchanger. On safety controls, match the OEM part.
Easy (2/5). Power down the furnace, pull the two spade connectors, remove the mounting screws, and install the replacement. Confirm continuity with a multimeter. If the new switch keeps tripping, check the filter, blower, and ductwork for airflow restriction before assuming a part fault.