My lincoln 220 compact mig welder turns on but trips when pull trigger. Iv tried another euro torch incase the oroblem was the torch but same results. Been told the wire feeder is the most common problem. Is this correct and how would i check this

SOURCE: MIG wire is always hot without pulling trigger

Check your manual, there are a lot of mig units on the market that are alway "Live" alternatively, the relay has either shorted or you have wirering problem on the switch.

SOURCE: looking for a heat and wire setting chart for

open the lid were u replace the wire it shud be on the underside of the lid

SOURCE: I HAVE A LINCOLN 175

Hello, do you have the welding tip in the nozzle? This tip provides the proper grounding of the electrode wire.

SOURCE: my mig wire melts inside base unit when trigger is pulled

The above information is not correct.

The entire wire is polarized by the tip during normal operation, making the entire supply of wire is polarized to whichever polarity is selected. The cabinet of the welder is usually bonded to the output, and so therefore is the spindle on which the reel is kept.

You are using a spool that has the wire anchored on the outside of the reel, rubbing on the spindle assembly, and making a sliding contact.

Put an insulator between them. A circle of thick cardboard (not corrugated) with a hole in the center can work well, as do plastic lids- Cottage cheese, tub of grease...