3D Printer Not Extruding Due to Filament Tangling

Filament tangling is confirmed when the extruder motor attempts to pull filament from the spool but encounters excessive resistance, causing the filament to stop moving or the motor to skip steps. Verify this by inspecting the spool for overlapping loops or knots that prevent the filament from unspooling freely. If the filament path is obstructed at the spool holder or guide tube, the extruder will be unable to feed material into the hotend.