Structural / Functional Issue

How to Fix Nozzle Clog (Blocked / No Extrusion)

Step-by-step fix for nozzle clog (blocked / no extrusion) on Bambu Lab printers including X1C, H2D, P1S, and A1.

Related Bambu Studio Error Codes

0300-4006030040060300-8016030080160300-801403008014

How do I fix nozzle clog (blocked / no extrusion)?

1
Do a cold pull: heat nozzle to 250°C, insert PLA, cool to 90°C, then pull firmly. The PLA plug pulls out debris and residue. Repeat 2–3 times until the pulled filament tip is clean.
Setting: Nozzle maintenance
2
For fiber-filled filaments (PA-CF, PETG-CF, PPA-CF), use a 0.6mm or 0.8mm nozzle — never 0.2mm. Fiber particles accumulate inside narrow nozzles and cause progressive clogging.
Setting: Nozzle size
3
When switching from high-temp to low-temp filament, first flush at 250–280°C with the new filament. High-temp residue solidifies at lower temps and blocks the channel.

Pro tip: Frequent clogs waste more time than slower printing. Select "Fast Print Speed" above to optimize print time while staying within safe flow limits.

Related Print Issues

Weak Layer Adhesion / Delamination Part Breaking Along Layer Lines Poor Dimensional Accuracy Part Too Flexible / Not Stiff Enough Bed Adhesion Failure / Part Detaching

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