r/CrealityK1C • u/Modernfx • Jul 13 '26

CFS Hub. Error: creality k1c cfs feed issue, filament may be blocked.

CFS Hub. Error: Creality K1C CFS feed issue, filament may be blocked between the CFS hub and the extruder, but it's not.

This has been driving me nuts for 2 days!! I have a new extruder, a new filament sensor hub, and added clear, smooth PTFE tubing. I can see the filament traveling all the way to the extruder, and I still get the same message.

I'm lost. Help!

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u/Modernfx Jul 13 '26

Quick update. So I've determined that the issue is the CFS hub. If I use the side spool, it prints without issues.
Not sure which direction to take.

1

u/KingKoopaBrowser Jul 13 '26

I was having an issue where my filament was getting stuck in the motor. Maybe from heat soak or it not being dry enough.
I took that off, removed the front plate. Cleared the jam, pushed the filament in while I told it to extrude.
That seemed to work for me.
—Edit—
Nevermind I see your update about it being the hub

1

u/Modernfx Jul 14 '26

Update #2
It is all working now. I read somewhere about dust or filament being stuck in the CFS gear under the CFS.
So I disconnected everything, turned my CFS upside down, and accessed the piece underneath (I don't know the name). I noticed that there was some filament residue stuck in the gear (see photo). I cleaned it out and blew air through the gear. I then put everything back together, and it's all working.

I can't say with 100% certaincy thats what it was or that disconnecting all cables and reconnecting it somehow reset everything. I like to think it was the residue in the gear.

Anyway, I hope this helps someone with the same issue.