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The Goodman 10123533 is a genuine OEM manual reset high-limit safety switch engineered for the GMS950703BXA 95% AFUE single-stage gas furnace and compatible Goodman/Amana models. This limit switch monitors heat-exchanger temperature and interrupts the burner circuit if the furnace overheats, protecting the equipment and your home. Because it is a manual reset design, it must be physically pressed to restore operation after a trip — a built-in signal that the system needs inspection.
The genuine OEM 10123533 is calibrated to Goodman's exact trip temperature and mounting footprint, ensuring proper safety response and a drop-in fit. Generic equivalents may vary in trip point or bracket geometry, risking nuisance trips or improper protection. For a safety-critical component, OEM is strongly recommended.
Moderate — Two-wire replacement with a mounting screw; requires shutting off power and gas, and basic multimeter testing. Best performed by an HVAC technician on safety circuits.