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The Goodman 10123533 Manual Reset Limit Switch is a genuine OEM safety control for the Goodman GMV951155DXBB 96% AFUE two-stage variable-speed gas furnace. This high-limit switch monitors heat-exchanger temperature and opens the circuit to shut down the burners if the furnace overheats — protecting against cracked heat exchangers and fire hazards. Its manual-reset design requires an intentional reset after a trip, prompting inspection of the underlying cause such as restricted airflow or a failed blower.
Genuine Goodman limit switches are calibrated to the exact factory trip temperature for the GMV95 heat exchanger. Generic switches with the wrong setpoint can nuisance-trip or, worse, fail to trip when needed. For a safety-critical control, always use the OEM-specified part.
Easy to Moderate. About 15–20 minutes with a nut driver. Turn off power and gas, disconnect the two spade terminals, unscrew the switch from the heat-exchanger panel, and install the replacement. If the switch tripped, diagnose the airflow or heat-exchanger issue before returning the unit to service.