I am using a creality ender 3 v3 se. Its been working great for almost a year now and all of a sudden filament won’t extract, or at most a very thin amount. Even when pla heated to 250 and manually pushed through very little comes out. I changed the nozzle and no avail. Did hot and cold pulls and nothing. When nozzle is removed filament passes cleanly through heating block. Any help? #technology #3dprinting #3d