25th October 2020 4:01 am
I recommend replacing the extruder or returning it for repair.
I do not know what is happening with the warranty support for US buyers. You may contact Circuit Specialists to see if they are able to assist you. They are the US reseller and may have some options or know more about the warranty support.
I suspect that the filament movement sensor is jammed, probably due to either an assembly problem or a small burr on the sensor wheel. If you want to preserve any warranty you may have, don't take it apart on your own. If you prefer to attempt to resolve it, there is an instruction to disassemble the extruder on the support site.
That is about the limit of what I can provide without actually seeing the extruder.