Extruder problem

So my prints were failing partway through acting like a clog. So I completely replaced the entire hot end but it kept happening. So I took the extruder and took it apart. But there’s nothing wrong with the extruder. Nothing is jamming it. But when I put it all back together my prints continue to fail. It just won’t grab the filament and extrude.

Using the preset settings for pa cf I haven’t messed with any settings. Really frustrating this has become a useless printer

try to run a length of filament through all the tubes…I had it happen to me and found a small piece of filament in the tubes…once cleared everything worked