Can not pass filament through hot end!

[Malachaihuffman 0]

I have an ultimaker original+ that will not extrude very easily. I started an 8+hr print before i went to bed, woke up to an incomplete print. There were no issues that i could find, yet i couldnt even force feed filament through the head. I Contacted fbrc8 tech support and they determined the issue to be a temp sensor, that did not fix the issue. I then put in a new nozzle and it does the same exact thing. If i push as hard as i can for approximately 45 seconds ill get a little nipple pushing through the nozzle.. i am at a loss here!

[IRobertI 521]

What type of filament are you using, and what temperature are you trying to extrude it at? If you hold the filament to the outside of the nozzle, does it melt?

[neotko 1,417]

Since is a umo+ please give us:

- Failed print photo

- Photo of your hotend installed to see if there's an issue on your assembly.

- Like @IRobertI said, can you extrude filament by hand/does it melt?

- Is the bowden fully in, inside the ptfe coupler?

- Do you observe any leak (brown/black goo) on top of the aluminuheater block or on the botton near the nozzle?

- How many print hours (aprox) has your printer? A PTFE coupler last 50-200h tops, 3dsolex resellers have/sell a TFM coupler that should last much longer (I mark 'should' since I never heard reports on this).

- Did you atomic your hotend lately? Is always a good idea to keep the pipes clean, so to speak...

[LePaul 331]

What's going on in the extruder? Is the knobbed-piece clean?

Can you manually crank that and eject filament?

I've had some filament that slipped in my extruder once....dirty knobbed bit.