MAG251 Fault Workflow Router

This router gives the fastest document order for the highest-value MAG251 complaints.

Complaint Routing

Incoming complaint	Open first	Then open	Then open if the complaint remains	Why this order works
arc feels rough or ripple-heavy	MAG251 measurement card	MAG251 parts substitution card	MAG251 board opening map	the right order is chart-correct plain-steel setup and external branch first, then the opening map only if the rough arc stays with the machine
wire feeds the wrong direction after board work	MAG251 measurement card	MAG251 board opening map	MAG251 job packet	post-service direction faults belong in install or motor-direction logic before random part swapping
only the spool gun or aluminum branch fails	MAG251 parts substitution card	MAG251 guide	MAG251 job packet	branch-only complaints still belong to the external spool-gun and drive-roll path before internal work
trigger starts feed but gas or start behavior is still wrong	MAG251 measurement card	MAG251 board opening map	MAG251 guide	the gas-valve and control branch is faster to prove from the card and opening map than from blind teardown

Official Parts Exit Paths

If the complaint proves external at any point in the router, use the official parts flow instead of continuing into board work.
MAG251 parts category: official parts path
SpoolKing24D spool gun 07NS1000: official product page
MAG251 drive-roll family including 072611011 and 07NS1005: official category page

Stop Rules

Stop if a known-good base gun or correct drive-roll family removes the complaint.
Stop if base MIG is healthy and only the spool-gun branch still fails.
Stop if corrected feed direction removes the complaint.
Stop and move to the full guide if ripple, gas, and feed evidence still overlap after the first pass.

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