Will not arc

There are several things that could cause this:
1. The relay (contactor) that switches on the arc is not closing and it could be bad.
2. The diodes in the power supply are bad.
3. The low voltage transformer is bad.

here's a forum on Hobart welders..hope it helps a little.
https://weldtalk.hobartwelders.com/forum/weld-talk-topic-archive/welding-products/22203-ironman-210-hobart-~-troubleshooting

make sure your work-piece has a proper ground. and maybe check your gas connection. no leaks. maybe turn gas down.

Arc blow could be the cause! Put your ground on the work piece and weld away from it. If you weld toward a ground clamp the magnetic forces will blow your arc around sometime. When taking a cert this simple mistake can make or break ya on your cap or reinforcement beads.

Check that your ground clamp is connected to the work piece securely.

hi,
maybe you haven't got the wire speed control turned up probly not the answer but sometimes its the simply things.

take side panel off where power goes into unit,check for voltage ,if not go to where plug is plugged into check for power if there is power check the crows foot to make sure all three wires are tightly screwed to terminals

unfortunatly many low cost MIG systems have live torches, check the instructions to confirm.

wityh what little imfo you gave I would first go to the main contactor ,turn unit on pull gun trigger see if the contactor pulls in.that is where primary power comes from to create arc.

Turn off welder, unplug and press trigger to discharge any possible stored juice. Then, open side door and check the ground cable where it connects inside, it sounds like either ground or the hot is off. Once you determine those are both securely attached, close door, plug in power on, attach ground clamp to test piece off metal and try it again. Let me know if this helps! Thanks:)