u/Alone-Ad-4755

I cleaned the entire system, made sure that there were no sharp bends and it gets all the way to the extruder, but once it gets there is just keeps grinding the fillament and then throws an error code FR2836, I think the issue might be the hotend and it not detecting the fillament, but it could possibly be the part where the CFS’s tubes join into the main one that goes into the printer?

This is an ongoing issue I’ve had for a long time but it was never this bad, I’m trying to do multicolor prints but every time the fillament gets to the hotend, it grinds a little bit at best and at worst it just keeps spinning on that back motor of the CFS. I replaced the nozzle, made sure the tubes are clean and smooth, and have done all the servicing I could think of, but it always happens, but sometimes (very rarely though) doesn’t. It’s one of the issues that was small enough that it was never a massive issue as I didn’t do a bunch of fillament changes with small amounts of ussage each color, but with the current projects I’m doing it more often which is probably why I’m seeing it more. Does anybody have any idea why this is happening? Thanks,