It's not this simple. Problems with nozzle can cause grinding. Problems with feeder can look like blocked nozzle.
If you have never done a cold pull - find it in the menus and try that first.
To determine if the problem is nozzle versus feeder - assure that the feeder can pull with 10-15 pounds force. Put filament part way down bowden (use that lever on the feeder). Then engage the feeder stepper by doing "move" in material menu on printer (S5 or UM3 is same). Then pull down hard on filament. It should hold 10 to 15 pounds and still move. If not then feeder is problem. If it holds then something in core is most likely problem. Alternatively you could have too many retractions - this happens with retraction heavy prints where it's pulling the same spot of filament through the feeder 20 times.
Hi! I have the exact same problem with my Ultimaker 3, what can we do to solve this issue?
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