WeldKing Symptom-To-Model Chooser

This page helps technicians identify likely WeldKing model families when the machine label is missing, the paperwork is incomplete, or the attached accessories do not clearly match the incoming unit.

How to Use This Chooser

Fast Identification Table

Visible clue or incoming complaint Likely model or family Confirmation clues Open first
compact arc inverter with 230 V class input, stick and lift-TIG, low OCV plus fan oddities CoolArc160 simple front panel, no multi-voltage sense behavior, fan-revision and auxiliary-supply clues CoolArc160 guide
arc inverter that acts like a multi-voltage or PFC machine, wrong 110 V or 220 V recognition, VRD confusion CoolArc200 input-sense behavior, J3 checks, display or state behavior tied to voltage class CoolArc200 guide
analog or conventional MIG machine with Bernard front-end parts and basic MIG baseline MAG211 simpler MAG family, spool-gun compatibility, no crater-fill emphasis MAG211 guide
MIG machine with capacitor-ripple or wrong motor-direction symptoms after board work MAG251 heavier MAG family with ripple and motor-direction branch MAG251 guide
MIG machine with crater-fill issues, post-trigger creep, or spool-gun voltage branch problems MAG255 crater-fill branch and spool-gun pins 1 and 9 logic are the giveaways MAG255 guide
compact inverter MIG with clicking, cycling, or generation-sensitive torch and drive-system differences MigSonic145 pre and post generation splits, trigger-wire branch, compact inverter behavior MigSonic145 guide
MIG system with separate external feeder package rather than an integrated feeder MigSonic252S+SS20 remote feeder present and controls living in the power source MigSonic252S+SS20 guide
older multiprocess or CV/CC style machine where trigger and rectifier branches matter more than digital state traps MigSonic200 CVCC service-manual-heavy unit with CV or CC split and shared capacitor-board family MigSonic200 CVCC guide
digital multiprocess unit with PRO10, flashing display, polarity-connector traps, or MIG dead while stick and TIG still work MultiSonic220 digital panel, state traps, ribbon and power-supply logic MultiSonic220 guide
AC/DC TIG machine with richer digital behavior, all-8 display possibility, wireless or remote control branches PulseWave200 multiple remote options, reset-state logic, torch-negative HF rule PulseWave200 guide
TIG machine with 220 V no-HF notes, calibration-sensitive local files, and richer parts diagrams CoolTIG220 local calibration files and 220 V no-HF documentation are the biggest clues CoolTIG220 guide
simpler AC/DC TIG unit where remote or pedal resistance branch matters more than digital state complexity TIG200PACDC simpler owner-manual-only package and 4K7 pedal expectation TIG200PACDC guide
plasma machine with built-in air compressor and no need for external shop air to reproduce the complaint CoolCut40air built-in air package and dual-valve routing CoolCut40air guide
plasma machine using external air with simpler 40 A class setup CUT40 no built-in air package and simpler external-air baseline CUT40 guide
plasma machine with no-HF-start local note on the 65 A class family CUT65 CUT65 no HF START local file and external-air branch CUT65 guide
plasma machine with pilot-maintain-current behavior or postflow with no start ThunderCut65 pilot_arc_maitain_current local file is the clearest clue ThunderCut65 guide
smaller plasma unit tied to CoolCut30 service material CoolCut30 support-power and capacitor-board style split with compact plasma baseline CoolCut30 guide

Identification shortcuts

If you can confirm... That usually means...
built-in air compressor package CoolCut40air
external feeder package MigSonic252S+SS20
PRO10 or all-lights-flashing digital multiprocess behavior MultiSonic220
crater-fill and spool-gun branch complaints on analog MIG MAG255
all-8 display or wireless remote style TIG complaints PulseWave200
wrong 110 V or 220 V recognition on an arc machine CoolArc200

When two models still look possible

Best follow-on references