Fault route
TIG Post-Flow Missing or Gas Stops Early Diagnostic
A TIG gas timing route for cases where shielding gas stops too early after the arc ends.
Quick Answer
Post-flow missing is usually a timing/control or gas-output problem, not an HF problem. Check panel post-flow setting, 2T/4T release logic, control-board timing and gas-solenoid output.
Diagnostic path
Panel post-flow setting → torch release/2T-4T logic → control-board timing → gas output driver → solenoid valve.
Evidence table
Gas opens before welding but stops immediately: post-flow command/timing issue. Gas output remains but valve closes: solenoid/wiring issue. No gas at all: use no-gas route.