What are the most common Ender 3 V3 SE problems?

Common Ender 3 V3 SE problems usually come down to setup, leveling, extrusion, or motion issues. The most frequent ones are:

• Bad first layer: poor sticking, nozzle scraping, or uneven lines. Usually fixed by cleaning the bed, re-running auto-leveling, and checking Z-offset.
• Z-offset/leveling inconsistency: one print looks fine, the next is too high or low. Check for a square gantry, tight frame screws, and a stable bed.
• Bed adhesion issues: corners lifting or small parts popping off. Slow the first layer, raise bed temp slightly, and use a brim if needed.
• Under-extrusion: gaps, weak walls, or clicking from the extruder. Often caused by a partial clog, wet filament, or wrong nozzle temperature.
• Stringing/oozing: fine hairs or blobs. Tune retraction, lower nozzle temp a bit, and dry the filament.
• Layer shifts: side-to-side jumps in the print. Check belt tension, pulley tightness, and movement for binding.
• Noisy or rough motion: squeaks or grinding from wheels or rails. Adjust eccentric nuts and check for worn wheels.
• Hotend clogs/heat creep: prints stop extruding after a while. Make sure the hotend fan runs and the nozzle is clean.
• Slicer profile problems: poor results even when the printer seems fine. Start with a known V3 SE profile and tune from there.
• Loose parts or connectors: shipping can leave screws or cables slightly loose. Do a full hardware check before long prints.

Best order to troubleshoot: square the frame, check belts/wheels, clean the bed, heat and re-level, verify Z-offset, then print a first-layer test.