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The Goodman 10123533 Manual Reset High-Limit Switch is a genuine OEM safety control for the GKS90704CXAC gas furnace. This thermal limit switch monitors heat-exchanger temperature and opens the gas/ignition circuit if the furnace overheats, protecting against fire and heat-exchanger damage. The manual reset design requires an operator to press the reset button after a trip, ensuring the underlying cause is investigated before the furnace restarts.
Limit switches are calibrated to a specific trip temperature. A generic switch with the wrong setpoint can trip early (nuisance shutdowns) or fail to trip (a genuine safety hazard). This genuine Goodman OEM switch guarantees the correct factory-rated cutout temperature and mounting bracket.
Easy to moderate (2/5). Disconnect power, unplug the two spade terminals, unscrew the switch from the heat-exchanger panel, and install the replacement in the same orientation. Verify operation on startup. If the old switch tripped, have a technician diagnose the overheat cause.