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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for the VMS80604BXAA gas furnace. This normally-closed thermal switch monitors for overheating or flame rollout conditions and cuts power to the gas valve if a dangerous temperature is detected, protecting the furnace and home. Because it is a manual-reset device, it requires the technician to physically press the reset button after clearing the fault — a deliberate safety feature that flags recurring problems.
OEM vs. Generic: Genuine Goodman limit switches are calibrated to the exact trip temperature specified for your furnace. A generic switch with a different set point can trip too early (nuisance shutdowns) or too late (unsafe operation). For a safety-critical control, always use the correct OEM part — never bypass a tripped limit switch.
Installation Difficulty: Easy (2/5). Two mounting screws and two spade wire connectors. Shut off gas and power before servicing. If the switch keeps tripping, diagnose the root cause (blocked flue, dirty burners, bad blower) before returning the furnace to service.
Genuine Goodman safety controls from National HVAC Parts — fast shipping and support at info@nationalhvacparts.com.