Upon inspection of the Sub Zero Professional Series refrigerator, it was determined that the ice maker was not producing ice. I began by examining the ice maker, identifying it as the source of the issue. The faulty ice maker was promptly replaced with a new one, ensuring optimal performance. Additionally, I cleaned the condenser coil to enhance the refrigerator's efficiency and cooling capabilities. After completing these tasks, the refrigerator was tested to confirm that the ice maker was functioning correctly and that the issue had been resolved.