Originally Posted by sluginxlt
well i went out to the garage and unplugged the wire from the gun to the machine and the gas flow still come on when i turn on the welder. I decided to remove the cover to see whats inside. theres 2 wires running to the gas valve i unplugged the white wire "not knowing what im doing" and then turned the machine on and the gas has stopped so i guess that means the valve is not physically stuck. so now could it be the valve solenoid or is it the board?
Solenoid is good, otherwise it would never stop. There has to be a relay that fires the gas valve that is stuck closed, so when you flip the power switch on it charges the solenoid. May be a cube relay, or it could be built into the board. Tap gently on all the little black boxes on the circuit board and one of then may release and stop the gas.