Performed maintenance on an HVAC system reported for no cooling. Inspected the unit and found a dirty air filter and clogged condenser coils, both restricting airflow. Replaced the air filter and thoroughly cleaned the condenser coils. Checked the refrigerant levels and added R-410A to reach optimal pressure. Examined the electrical components, including capacitors and contactors, for proper operation. After completing these tasks, tested the system to ensure it was cooling efficiently.