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The Goodman 10123537 Manual Reset Limit Switch (Gray) is a genuine OEM safety control for the WGFM295090V5DAA 95% AFUE gas furnace and compatible Goodman/Amana models. This normally-closed thermal switch opens and cuts power to the gas valve if it detects an over-temperature or flame-rollout condition, protecting the furnace and your home from unsafe operation. Because it is a manual reset type, it must be physically pressed to reset after tripping — a deliberate design that forces a technician to identify the root cause (blocked airflow, dirty filter, cracked heat exchanger, or failed blower) before the furnace restarts.
OEM vs. Generic: Safety limits are calibrated to a specific trip temperature. The OEM 10123537 opens at the exact setpoint your furnace engineers specified. A generic switch with the wrong trip point can either nuisance-trip or, worse, fail to protect against a genuine overheat — never guess on a safety component.
Install Difficulty: Easy (DIY-friendly). Replacement takes 10–15 minutes: shut off power and gas, remove the two spade connectors and mounting screws, and install the new switch. Important: If a limit switch tripped, diagnose why before returning the furnace to service.