Nozzle Clogged
Bambu Lab 3D Printer
Severity:What Does This Error Mean?
A clogged nozzle on a Bambu Lab printer causes under-extrusion, gaps in prints, or a stopped print with a clog detection alert. The fastest fix is a cold pull — heat the nozzle to 200°C, push filament through manually, then cool to 90°C and pull the filament out sharply to extract the blockage.
Affected Models
- Bambu Lab X1C
- Bambu Lab X1E
- Bambu Lab P1S
- Bambu Lab P1P
- Bambu Lab A1
- Bambu Lab A1 Mini
Common Causes
- Printing at too low a temperature for the filament type, causing partial melting and blockage
- Filament left in the hot nozzle while idle — material degrades and carbonizes
- Switching between incompatible filaments without a proper purge (e.g. from PA to PLA)
- Moisture-damaged filament that bubbles and leaves residue in the nozzle
How to Fix It
-
In Bambu Studio or on the touchscreen, go to Device > Toolhead and set the nozzle temperature to 200°C for PLA, 230°C for PETG, or 270°C for ABS/PA. Wait for it to reach temperature.
Use the temperature for the filament that is currently in the nozzle, not the next filament.
-
Manually push a short length of filament through the nozzle until clean material flows out. If nothing comes out, the clog is severe — proceed to a cold pull.
-
For a cold pull: heat the nozzle to 200°C and push filament in firmly. Then set the temperature to 90°C. As it cools, maintain gentle push pressure. When it reaches 90°C, pull the filament out firmly and quickly in one motion.
The pulled filament should come out shaped like the inside of the nozzle with debris embedded in the tip. Repeat 2–3 times with fresh filament until the pulled piece comes out clean.
-
If cold pulls do not clear the clog, remove and replace the nozzle. Bambu Lab nozzles are user-replaceable and are available in hardened steel for abrasive filaments.
Use the nozzle wrench that came with the printer. Heat the nozzle to 200°C before removing it — a cold nozzle is seized into the heat block.
Frequently Asked Questions
How do I prevent nozzle clogs on my Bambu Lab printer?
Use the Bambu Lab AMS purge system to fully clear one filament before loading another. Avoid leaving the printer idle with the nozzle at temperature for more than 15 minutes. Store filament in sealed containers with desiccant to prevent moisture absorption, which is a major cause of nozzle residue.