I have had an intermittent small problem with my machine, It is very strange and does it on AC and DC , I can start an arc and weld ( mostly no longer than 2-3 minutes at a time) with no problem, but occasionally when i stop and try to start back up i have no arc or HF. If and when this happens i let back off the trigger on the torch and just lightly touch the tungsten to the weld material and back off then hit the trigger again it will start up and weld fine. I have not found anything i am doing to cause this to happen, ground is good ect. ???????

This only happens when i use the torch not the foot pedal.
Is it possibly a lose wire in the tig torch ???