I've been running this Ender 3 Pro for quite some time with no problem up until recently. The issue was the printer refused to extrude filament (the extruder stepper seems to be rocking back and forth) so I went through a few things to try and fix the problem:
- I leveled the bed properly
- I printed at higher temperatures (215 °C for PLA which is the only filament I run in this printer)
- I cleaned the nozzle and I actually replaced the nozzle with a new 0.4 mm nozzle (same size as before)
- I replaced my Bowden tube with a newer one (unbranded) and even replaced the tube fittings for the extruder assembly and the heat sink.
I saw somewhere that maybe the wiring to the extruder gear is frayed but I inspected the extruder side of the connector and everything looks fine. I would open up the box and everything but I want to see if anyone has a solution before opening up the circuit box.