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My miller sychrowave tig welder is not blowing sheilding gas when it strikes an arc. The gas is on at the tank. I can hear what sounds like gas or a valve opening when I press the foot control, but my sheet metal immediately rusts when I strike the arc. The hose is not obstucted. The manual doesn't mention this problem.

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Remove the tig torch twist lock from the front of the machine. Step on the pedal as if you were striking an arc and gas should flow out of the twist lock port. If gas comes out of the port, your torch probably has a valve built in (many do) often this is a sleeve on the torch body which you rotate but may not be obvious.
If no gas out of port then its the solenoid or regulator.
You do have the machine in TIG mode and not stick?

Posted on Jun 04, 2010

Testimonial: "Your solution didn't solve the problem directly, but it led me to the solution. I had the tig torch hooked up to the "work" plug when it needed to go into the "electrode" plug. Removing the side panel to find the valve showed me where the argon hose went. Thank you!"

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Posted on Jan 02, 2017

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