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Okay, I have a UM2 Extended and this machine will go down as the biggest piece of junk in history. I can not clear a jammed nozzle even after 8 or 10 tries at the atomic method. The forum has a lot of good info but not much on nozzle cleaning. What do I do now? I have other nozzles that came with my machine but how do you change them. The user manual is just about useless.

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Hi,

and welcome to the forum.

Which model do you have exactly? The Ultimaker 2 Extended+ or "regular" Extended?

If it is the +, then you'd have the so called Olsson Block and you need to follow this guide:

https://ultimaker.com/en/resources/18805-changing-nozzles

If it is the regular UM2 Extended, you need this guide (skip to step 3.):

https://ultimaker.com/en/resources/252-disassembly

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