Disconnect inlet hose briefly to confirm gas is available.
Fault route
MIG200DL Trigger But No Gas Diagnostic
A gas-valve diagnostic route for MIG200DL welders using P17 DC24V gas-valve supply evidence.
Quick Answer
For MIG200DL trigger but no gas, separate outside gas supply from power-board P17 DC24V gas-valve output and the solenoid valve itself.
- Remove the external gas-hose assumption first: verify gas is available at the machine inlet.
- P17 should provide DC24V to the gas valve when trigger conditions are valid.
- If P17 has output, inspect the gas valve; if P17 is missing, inspect power-board gas-control path.
Use this page when
- Machine powers on and torch trigger can be pressed.
- Wire feed/output may respond but gas does not open.
- P17 gas-valve output can be measured.
Do not use this page when
- The torch switch has no response at all.
- The machine is completely dead.
- Gas flows continuously after power-on.
MIG200DL trigger-no-gas route
External gas supply, board-side DC24V, then gas valve.
Confirm trigger reaches the control path.
Power-board P17 should feed the gas valve.
If DC24V exists but no gas, inspect/replace valve.
If P17 output is missing after valid trigger, inspect gas-control output.
MIG200DL gas evidence table
| Evidence point | Expected / abnormal evidence | Repair direction |
|---|---|---|
| External gas inlet | No gas upstream means board checks are misleading. | Fix gas supply first. |
| Torch trigger path | No trigger response may stop gas command. | Use trigger-no-response route if needed. |
| Power board P17 | Expected DC24V output for gas valve. | If missing, inspect power board gas-control section. |
| Gas valve coil | DC24V present but valve does not open. | Replace gas valve or repair valve wiring. |