Please open idler and remove filament manually

Updated 6 months ago ​by Tomáš Chvalina

The error message Please open idler and remove filament manually occurs when filament unloading process did not work properly. It sounds worse than what it actually is, so there is actually no need to stop the print. 


  1. First, we must open the extruder idler.
    1. Original Prusa i3 MK3: simply undo STEP 15 in the MK3 E-axis assembly.
    2. Original Prusa i3 MK2/S: simply undo STEP 16 in the MK2 Extruder assembly.
  2. After that, you can easily open the extruder idler and clear the filament manually
  3. The best tool for that is the bundled pliers. However, If there is any filament stuck in the opening of the extruder, simply push it out with a new filament. 
  4. Once all is done, simply close the extruder idler and resume printing.

Do not hesitate to contact us at if you would have any further questions. 

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