A customer reported that their Subzero refrigerator was not cooling properly. I began by inspecting the refrigerator's evaporator fan motor, a critical component for maintaining the correct temperature. After confirming that the motor was the issue, I safely disconnected the power supply. Next, I removed the necessary panels to access the motor, ensuring minimal disruption to the appliance. The old motor was carefully detached and replaced with a new one, ensuring all connections were secure and properly insulated. I then reassembled the refrigerator, tested the new motor, and verified that the cooling function was restored. The refrigerator now operates efficiently, providing the desired cooling performance.