I began by ensuring the thermostat was set to the cooling mode. I then disabled the scheduling feature to allow for manual control of the system. Next, I meticulously cleaned the flame sensor to ensure optimal performance and safety. Following this, I conducted a carbon monoxide test to verify the system's efficiency and safety. I also cleared the outdoor termination to remove any obstructions that could impede airflow. Throughout the process, I maintained a focus on precision and safety, ensuring that all components were functioning correctly. The system is now ready for use, providing a comfortable environment.