my oxford welder mig 170 has started playing up ,it has 4 power settings on setting 2 the one i usually use for welding cars it will not strike a continuos ars it just spits as if its striking the arc and then stopping then striking the arc and stopping and so so ,when you put it on setting three it strikes the arc and it will sometimes start to weld for a few seconds then it starts to spit as if its striking the arc then stopping then stiking the arc and stopping and so on ,this is the best way of describing it i can think of but please ask if you need more info ,any help would be greatly appreciated thanks phil
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