My plan was to never switch from MK to PK, but of course Murphy’s Law prevailed. I have a 3800 with the dreaded damper problem where the PK cart drains completely after a MK to PK switch. More recently, I had good nozzle checks throughout. However, after switching back to MK, now my MK nozzle check is completely blank. I know it’s not a clog because it happened immediately after the darn switch.
The last time I inadvertently switched to PK (yeah, it’s happened before), I did an Auto Nozzle check and it practically filled up my maintenance cart and ended with an Error on two tries. But it eventually came back.
I tried printing a full page of MK to no avail. I believe there is lots of air in the lines. How do I replace the air with MK ink? I would give up except I have carts mostly full with ink and before this the printing was going well.