Today, I successfully replaced the primary control unit in the system. This involved diagnosing the issue, ordering the correct replacement part, and carefully installing it. I ensured that all connections were secure and tested the system to confirm proper functionality. The new control unit was integrated seamlessly, and the system is now operating efficiently. This task required precision and attention to detail to guarantee that the system would perform optimally. The job was completed on time, and the client is satisfied with the restored functionality.