A clog after a filament swap is often caused by leftover material with a different melting range, burnt residue, a poor unload/load process, or a slicer temperature mismatch.
A clog after a filament swap is often caused by leftover material with a different melting range, burnt residue, a poor unload/load process, or a slicer temperature mismatch.
Start with observation first. Do not change multiple slicer settings at the same time or the real cause becomes harder to find.
Use these as practical starting points, then tune against your printer, material, nozzle, layer height, and model geometry. The safest workflow is one controlled change at a time.
| Setting Area | What to check |
|---|---|
| Purge temperature | use the old material safe range if switching from hotter filament. |
| Print temperature | do not leave PETG/ASA settings active for PLA or the reverse. |
| Retraction | retune after material changes. |
| Flow | only calibrate once extrusion is physically clean. |
| Speed | slow first test prints after clearing a clog. |
Extrude 100 mm at print temperature and confirm a straight, smooth strand. Then print a small single-wall cup to verify flow remains consistent.
After the validation print succeeds, save the exact printer, material, slicer, nozzle, layer height, support, bed adhesion, and cooling setup in Profile Vault so the fix becomes repeatable.
Only use tools that match the diagnosis. Common helpful categories include PEI cleaning supplies, filament dryers, nozzles, deburring tools, calipers, support-removal tools, and safe resin handling equipment.
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