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The OEM Goodman 10123532 is a manual-reset high-limit safety switch designed for the WGGE4342A070MAB gas furnace. It monitors heat-exchanger and burner-area temperature and trips the burner circuit if it detects an overheat or flame-rollout condition, protecting your furnace and home from unsafe operation. Because it is manual-reset, the button must be pressed to restore operation after a trip — a deliberate design that flags a fault needing attention.
Genuine Goodman limit switches are calibrated to the exact trip temperature specified for your furnace. Generic switches may trip early (nuisance shutdowns) or late (a real safety risk). For a critical safety component, OEM is strongly recommended.
Moderate — requires removing the burner-compartment panel and swapping two spade terminals. Always disconnect power and gas before service. A frequently tripping switch indicates an underlying airflow or heat-exchanger issue — have it diagnosed.