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Explosive printer failure: Anyone know how to fix?


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Posted · Explosive printer failure: Anyone know how to fix?

I use an Ultimaker 3 in my lab.

Had a print run over the weekend. Came back to find that filament had massively built up inside the nozzle housing, causing the fan module to burst forward.


Has anyone had this issue / know how to fix it?



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Posted · Explosive printer failure: Anyone know how to fix?

This seems to happen when the print is knocked about or knocked over and dragged a bit. The filament just builds up inside the fan/core area.


The best way to clean it out is to heat the nozzles in the materials section/printcores 1 & 2, and pull it out with needle nose pliers. Be careful about yanking wires out though. It takes a bit of patience. Then, when you can pull the cores out, do so and attempt to further clean via hot air gun or some other way of heating the core while able to pull as well.

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