Miller dialarc hf-p

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Picked up a miller hf—p a couple years ago and just got a cart made for it and everything installed  correctly, except for the water cooler it might need fixed but I was told u don’t have to use it if your just welding thin steel, I am having an issue concerning when I try welding, it’s my firstTime using a tig and  when it’s on and I begin to press the foot pedal with the filler rod and the tigo hand and ground is connected and gas is on and everything is in place to best offMy knowledge, but it’s still not trying to arc even if I touch the ground, any info would help me out so much and would be great thanks
Reply:#1 it is probably a good thing it won't weld. Everytime I have welded with the water cooler turned off I have burned up my torch and needed to repair or replace it. I think you were given bad advice/instructions regarding when to use the water cooler. I would say anytime you are TIG welding, you need the water cooler on. when it’s on and I begin to press the foot pedal with the filler rod and  the tigo hand and ground is connected and gas is on and everything is  in place to best offMy knowledge, but it’s still not trying to arc even if I touch the  ground, any info would help me out so much and would be great thanks