| Symptom | Most likely causes | First checks |
|---|---|---|
| No start | Bad consumables, poor clamp, air path issue | Replace front-end parts and verify clamp |
| Poor thick-material cut | Weak supply, wet air, worn consumables | Verify direct power and dry air |
| Short consumable life | Bad standoff practice, wet air, torch damage | Inspect air quality and torch front end |
| Intermittent output | Hot plug, poor clamp, thermal or airflow issue | Check connector heating and airflow |
air path, consumable path, and power/clamp path.