Is it a separate wire feed unit, or a 'compact' model with the wire feed integrated in the main unit? If separate, what model?
What have you done to see what the problem is?
Is there voltage at the motor when you press the trigger?
I presume the click when you press the trigger is the gas solenoid activating - is it?
Are you testing it without wire on the spindle - just to see if it rotates, this would eliminate a jam in the torch liner or similar issues not related to the wire feed directly.
Does the separate 'feed wire' button work? Should be a black domed button on the front or a push-with-screwdriver type button inside the wire feed unit.
If you really need the machine for generating income and you're not sure how to diagnose the problem, get it to the nearest welding plant servicing place asap.
Try googling Migatronic UK, they are a friendly bunch.
