| Symptom | Most likely causes | First checks |
|---|---|---|
| No start | Bad consumables, poor clamp, air path issue | Replace front-end parts and verify clamp |
| Poor cut quality | Wet air, wrong speed, worn consumables | Verify dry air and install fresh parts |
| Weak output on thick work | 120 V limitation or supply drop | Move to 240 V and retest |
| Intermittent cut | Hot plug, poor clamp, thermal or airflow issue | Check heating and airflow |
air path, consumable path, and power/clamp path.