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Posted · Ultimaker 2 extended nozzle clog

My nozzle in UM2E+ keeps clogging after few hours of printing,

 

I checked the nozzle and it seems fine , I also checked and cleaned the extruder mechanism. 

The cooling fan to cool the heat break runs very slowly. Also there seems to be a leak of filament above the nozzle.

 

Could someone point me in the right direction about what needs to be done, I have attached a picture for reference.

 

 

ultimaker_1.thumb.jpg.539f5e9ce5f5cd481dbfb313c602a93e.jpg

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