OK I have a very clean older dual filament printer. When I bought it it had filament already fed into the extruder heads. I have been printing out of both heads just great. I now want to change the left extruder filament. I performed just as the menu tells me to but it will not feed the new filament through the extruder.

I feed in the new filament and the feeder grabs it and pulls it in, then it suddenly just stops pulling. I can feel the motor still driving. This is up to temperature (225C for ABS) but it just stops. going and the motor keeps going. I have re-cut the end several times ( I have tried angled and straight cuts) and continued pushing the material to the point it snapped in my hand. If I press the release lever I can pill it out and re-feed and it grabs and all then stops. I have tried twisting the new filament to no avail.

Any ideas as to what I should do?

Thank you.

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