STLBEAST workshop mode
Heat Creep Jam Fix
Fix prints that start normally and then lose extrusion, especially with PLA in warm enclosures.
Start hereHeat creep softens filament above the intended melt zone. Verify heatsink cooling, hotend assembly, enclosure temperature, and retraction before increasing nozzle heat.
First safe actionRun the first safe check and change one variable at a time.
Proof targetA small representative test no longer shows the original symptom.
Match the failed area to the visual before changing a setting.
Repair progress0 of 7 complete
Step 1 of 7
Confirm the heatsink fan starts, runs at full required speed, and blows in the correct direction.
Keep the problem and target visual open while you make this change.
Why this mattersHeat travels upward into the cold zone.
Setting or checkRetraction distanceAvoid extreme values, especially on all-metal hotends.
Expected resultLong test completes without fading flow.
Keep the problem and target visual open while you make this change.
Why this mattersPLA can soften in the feed path.
Setting or checkEnclosureUse material-specific chamber practice.
Expected resultFilament unloads without a swollen plug.
Keep the problem and target visual open while you make this change.
Why this mattersHot filament is repeatedly pulled into the transition zone.
Setting or checkNozzle temperatureDo not raise as a first response to heat creep.
Expected resultHeatsink stays actively cooled.
Keep the problem and target visual open while you make this change.
Why this mattersThermal path is not controlled.
Setting or checkMinimum print speedVery slow tiny parts may need cooling or sequencing changes.
Expected resultExtruder remains quiet.
Step 5 of 7
Inspect hotend assembly, heatbreak, tube seating, and nozzle installation per manufacturer instructions.
Keep the problem and target visual open while you make this change.
Why this mattersFilament sits heated for too long.
Setting or checkRetraction distanceAvoid extreme values, especially on all-metal hotends.
Expected resultLong test completes without fading flow.
Keep the problem and target visual open while you make this change.
Why this mattersHeat travels upward into the cold zone.
Setting or checkEnclosureUse material-specific chamber practice.
Expected resultFilament unloads without a swollen plug.
Keep the problem and target visual open while you make this change.
Why this mattersPLA can soften in the feed path.
Setting or checkNozzle temperatureDo not raise as a first response to heat creep.
Expected resultHeatsink stays actively cooled.
Controlled test logChange one variable, then record what happened
This keeps temperature, retraction, speed, mechanical, and material tests from blending together. The history stays private in this browser.
Open proof report →No controlled tests logged yet. Record the first change before adjusting a second variable.
Do not repeat the full print yet
Prove the repair with a small test
Test model100 mm extrusion and thin-wall test
SetupUse the same nozzle, material and hotend temperature planned for the print.
Pass conditionFlow is smooth and the wall is continuous with stable width.
If it still failsClicking, gaps, pulsing or inconsistent line width remains.
Complete the repair steps, run the proof test, and record the result.
Only if the proof test still failsNext strongest repair paths
Do not stack these changes. Open one related guide based on the evidence that remains.
ExtrusionPartial or Clogged Nozzle Fix
ExtrusionExtruder Clicking or Grinding Filament
Extrusion3D Printer Under-Extrusion
