Filament Will Not Load into the Extruder

Document the failure and confirm that it matches this guide: Filament stops before the nozzle, bends at the feeder, or never reaches the hotend.

Return extreme overrides to a known printer, nozzle, material, and slicer profile so the diagnosis starts from a stable baseline.

Check cut end is blunt or bent. Cut a sharp angled tip.

Check extruder path is misaligned. Open the idler and align the path.

Inspect ptfe tube obstruction. Inspect the PTFE tube.

Rule out hotend not at loading temperature. Heat to the material load temperature.

Change only the single setting or hardware condition supported by the evidence, then run a small test that reproduces the original failure.

Compare the test against the target condition, record the successful value, and save it in a printer/material profile before repeating the full print.