Main Causes of Airflow Issues in Handheld Laser Welding Machines Gas Cylinder Issues: The gas cylinder may not be open, or it may be empty. Damaged Air Blow Port: The port responsible for releasing air may be burnt or damaged. Faulty Solenoid Valve: A malfunctioning solenoid valve may cause airflow problems. Continuous Airflow: Air continues to flow without being turned off. Airflow Blockage: Blockages in the air circuit can lead to insufficient airflow or no airflow at all.