| SYMPTOM | CAUSE | SOLUTION |
| Gun does not actuate when triggered. | Air switch assembly is closed | Open |
| Plugged exhaust | Clean air ports in handle | |
| Damaged trigger spool o-rings | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| There is no fluid spraying when the gun is fully actuated. | Closed fluid valves | Open |
| Plugged impingement ports | Clean | |
| Plugged check valves | Clean | |
| SYMPTOM | CAUSE | SOLUTION |
| Gun actuates slowly. | Plugged exhaust | Clean air ports in handle |
| Damaged piston o-rings | Replace | |
| Dirty air valve, or damaged o-rings | Clean air valve or replace o-rings | |
| SYMPTOM | CAUSE | SOLUTION |
| There is a leakage between flat tip and mixing chamber. | Tip is not seated properly | Reassemble |
| Damaged or missing seal | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| There is a pressure imbalance. | Plugged impingement ports | Clean |
| Plugged check valves | Clean | |
| Viscosities are not equal | Adjust temperature to compensate | |
| SYMPTOM | CAUSE | SOLUTION |
| There is A and/or B side fluid in the gun air section. | Damaged side seals | Replace |
| Damaged mixing chamber | Replace | |
| Damaged side seal o-rings | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| Fluid mist from mix chamber or air cap. | Damaged side seals | Replace |
| Damaged mix chamber | Replace | |
| Damaged side seal o-rings | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| The fluid does not shut off when fluid valves are closed. | Damaged fluid valves | Tighten packing or replace |
| SYMPTOM | CAUSE | SOLUTION |
| Burst of air from muffler when gun is triggered. | Normal | No action required |
| SYMPTOM | CAUSE | SOLUTION |
| Steady air leakage from muffler. | Damaged air valve o-rings | Replace |
| Damaged piston o-rings | Replace |