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Nozzle completely clogged

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I've tried to print with 1.75mm and since then, every time I want to print something, I have to do the atomic method in order to unblock the extruder/nozzle.

Unfortunately, now the nozzle/extruder is completely clogged which means that, after removing the bowden tube and the four screws, when I try to force push some filament directly in the extruder, nothing moves. I think there might be some plastic stuck right before the hot nozzle, is blocked there, and cannot be pushed.

Does anyone have a solution to this problem? I need to print a couple of things for my presentation next thursday and my ultimaker 2 needs to be able to print it ASAP,







Edited by Guest

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Well, your coupler looks quite deformed. Have you check the tip of the coupler for brown/burns/not being a perfect circle anymore


If so, think about upgrading the coupler to tfm + spring replacement to a fixed size spacer (any UM reseller has them).

Edited by Guest

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