From the last 40 error messages I have many entries of:
8 - 100 Jam1
Then 1-100 because I open the door to clear the jam.
Sometimes there is
8 - 620 Duplex Jam2
But more often we have Jam1
The 'All Faults' list is totally empty.
What does the exit fuser sensor look like, and where in the machine is it?
What is the procedure for checking it by hand? The fuser is hot - don't want to burn myself.
Note: the paper is getting accordion-folded and jamming before it enters the fuser.
This is what the paper jam looks like, see the "accordion" fold and how it is under the fuser. What part is the likely cause? See my previous post about the sensor, I don't know where any sensor is or what they look like.
Ok. It looks like to be a mechanical/electrical problem. It is possible to be an defective clutch or sensor, so it will be better to have a tech to closer look at your printer.