Random errors is likely a bad board. Check connections and tighten screws, my display cleared up. Test input power, And clean with alcohol. Contact Everlast support if it keeps up.
Grinding fan is likely bad bearings. Check motor for wear, And clean vents with compressed air. my fan quieted down after that. Lube bearings, And replace if it is bad.
Uneven feed comes from bad tension or rollers, Adjust drive roll tension on Handler 190, My Hobart had same issue, Use 230 ipm wire speed, Clean liner with alcohol, Check for wire kinks, Set voltage to 20V, Replace worn rollers.
Feed is jerky cause of bad tension. Adjust roller pressure, my wire feeds smooth now. Check liner for clogs, Use 0.035-inch ER70S-6 wire, And clean with alcohol. Lube the liner too.
Faulty ground clamp prevents ignition. Tighten clamp, clean with alcohol, my welder starts better. Check electrode for dampness, bake at 250°F for an hour to stabilize arc.
