Printhead clogged up with filament Help request

[choeppke 0]

Hello,

there is a big Problem with my Ultimaker-2.

Printing problems caused quite a lot of filament to

be stuck inside of the print head.

While the nozzle is

free and does print ok, during printing the material

inside the print head is heated up, causing it to

flow out of the head and mess up the print.

Advice on how to clean the print head

are very much appreciated.

All the best,

Christoph

[Labern 735]

you can heat the nozzle and pull it free from the big melted mess.

To remove it from the rest of the parts you can use a heat gun to soften it or unscrew the fans and put the fan shroud into hot water (if its PLA)

[schablone 0]

I had the same problem this week (UM 2 ex). Til now I do not understand the reason.

I cleaned it, changed the material and I leveled the printbed. Now everything is fine.

Does anybody have a clue?

[Labern 735]

This Can be caused by a few different things.

Leaking from the top of the Olsson block where the steel nut threads on.

Leaking from the nozzle threads.

Print coming off build plate or something wrong while printing forcing melted plastic upwards.