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The genuine OEM Goodman 10123532 manual reset high-limit switch is a safety control for the WGGE4336A090MAB furnace. It monitors heat-exchanger and plenum temperature and opens the circuit if the furnace overheats — for example, due to restricted airflow or a dirty filter. Because it is a manual reset device, it stays open until an operator presses the reset button, prompting the homeowner or technician to investigate the underlying cause before the furnace can run again.
High-limit switches are trip-temperature specific. The OEM 10123532 opens at the furnace's designed limit temperature, ensuring proper protection without premature nuisance trips. Generic switches with different ratings can compromise safety or reliability. Choose the genuine Goodman part for correct protection.
Easy — Typically two mounting screws and two spade wire terminals. A quick, low-cost safety replacement. Always disconnect power before servicing and correct any airflow issue that caused the trip.