Gas is supposed to flow for about 15 -20 seconds after arc is dscontinued. My problem is gas flows until welder is disconnected from electric power supply
A service manual or schematic of mother board would be helpful
Welding Tools - Lincoln Electric - K1478-5 - Tig Welder, Square Wave, 10-175A, 230V
Answers & Comments
Http://www.lincolnelectric.com/en-us/support/Pages/operator-manuals.aspx