Filament broke inside feed tube

Sometimes filament can break while it's being fed from the spool into the extruder. This is particularly common with older filament, which can absorb water and become brittle.

To fix the issue, you'll need to remove the feeder tube from the extruder and push the broken filament though until it's all out.

Look at where the tube enters the extruder; there is a small gap on the side.

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Use a screwdriver to gently push in that gap and, at the same time, gently pull the tube out. You shouldn't need a lot of force to remove the tube once the release has been pushed.

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