Out of Box MK4 fails extruding - Assembly and first prints troubleshooting https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/out-of-box-mk4-fails-extruding/ Prusa3D Forum Discussion Board en-US Fri, 13 Mar 2026 20:59:29 +0000 wpForo 60 Out of Box MK4 fails extruding https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/out-of-box-mk4-fails-extruding/#post-729067 Fri, 06 Dec 2024 08:15:49 +0000 I did some googling and found nothing. Problem: I cannot get the nextruder to extrude filament. I select load filament, the sensor seems to recognizes, some noise is produced (grinding) but nothing comes out of the nozzle. When I open the side it looks as if the filament is not positioned correctly. There is no abrasion on the filament, nozzle is clean. Filament is cut at 45 deg.

Where is the filament supposed to end up if correctly loaded? Is it possible to open the side and push it to the correct place? I feel like I'm doing something stupid, since it never worked....

]]> Assembly and first prints troubleshooting SG https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/out-of-box-mk4-fails-extruding/#post-729067