Structural / Functional Issue

How to Fix AMS Filament Change Failed / Purge Timeout

Step-by-step fix for ams filament change failed / purge timeout on Bambu Lab printers including X1C, H2D, P1S, and A1.

Related Bambu Studio Error Codes

0300-400803004008

How do I fix ams filament change failed / purge timeout?

  1. 1

    For purge timeout: the extruder likely has a partial clog. Do a cold pull to clear residue, then click "Retry".

  2. 2

    For AMS mapping errors: click "Retry" — this is often a temporary communication glitch. If it persists, power cycle the printer and AMS.

  3. 3

    Check that filaments are correctly loaded in AMS slots with flat-cut ends (not angled or frayed).

Pro tip: Filament change issues are most common with multi-color prints.

Related Print Issues

Weak Layer Adhesion / DelaminationPart Breaking Along Layer LinesPoor Dimensional AccuracyPart Too Flexible / Not Stiff EnoughBed Adhesion Failure / Part Detaching

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