[Printhead clogged up with filament Help request]

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