Ultimaker 2+, extrusion problem

3D Printers

Jul 7, '16

I don’t have experience with UM2, but it makes sense to remove the hot end to reach the isolator coupler. I have UM1 which should be about the same.

Ultimaker 2+, extrusion problem

3D Printers

Jul 7, '16

For PLA I would recommend Tetrahydrofuran, it will clean your nozzle for any left overs. But you might also want to check the health of your isolator coupler (the white part next to the brass tube).