No shielding gas
All other functions present
Gas cylinder empty
Change gas cylinder
Gas pressure regulator faulty
Replace gas pressure regulator
Gas hose kinked, damaged, or not attached
Attach and straighten gas hose. Replace faulty gas hose
Gas solenoid valve faulty
Replace gas solenoid valve
Poor ignition properties
Unsuitable tungsten electrode (e.g., WP electrode for DC welding)
Use suitable tungsten electrode
Wearing parts loose
Screw on wearing parts tightly
Gas nozzle is cracked
Tungsten electrode not protruding far enough out of the gas nozzle
Have tungsten electrode protrude more out of the gas nozzle
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