The best process if you wish to do the repair yourself is to manually heat the nozzle using the on display control (heating to 240deg)
- Once the nozzle heats up you can use an allen key to remove the fans/metal fan shroud (2 x screws ether side - 4 total). This will give you better access to the hotend.
- Once this is removed and while the nozzle is hot you should be able to use a pair of needle nose pliers and maybe some wire cutters to carefully pull away the flooded material/filament.
- Pay close attention to where the wires connect to the heating block as if these break you will need to replace them.
- You can use a small metal wire brush to clean the remain residue off the heating block (you wont get it perfectly clean but 95% is fine)
- Some times a heat gun can be helpful as well
- If you're careful and take your time you should be able to clean and re assemble the print head without damaging any components
- Needle nose pliers
- Small metal wire brush
- Razor blade
Step 1:reassemble print head.
Step 2:remove four screws (2 on ether side) on printhead holding main fan bracket.
Step 3: Manually heat the nozzle using Ultimaker on board menu - Maintenance>Advanced>Heat up Nozzle. to 230degWait 3 mins for full heat to start to soften the material
Step 4: Using the plier slowly and carefully pull away the flooded materialPay close attention to the two wire running in the back of the print head - be extra-careful not to damage these
Step 5:User wire brush and razor blade to clean off remaining material - it will never be 100% clean so just get it good as you can.
Step 6: Reassemble 4 x screw / fan bracket.
Final step : Insert Allen key in to one of the holes around the aluminium ring below the white insulator. Turn this to make sure its tight (don't over crack it though)