O.k. here's the bizarro scenario I find myself in. My F-06 code on our 14 year old Kenmore He3, corresponds to our slop...

O.k. here's the bizarro scenario I find myself in. My F-06 code corresponded to our slop sink filling up with water with every drain of our Kenmore He3. The two sources of drainage (the washing machine and the slop sink) join at a "Y" and then after a trap go into the main waste-water stack. So I did all the simple checks described for the 06 (checked the connectors, checked the trap) and there was no change. But the slop sink filling kept gnawing at me b/c of the coincidence - and also the filter trap and the black "bellowy" tubing before the filter trap and pump was always filled with badly smelling water when I was checking. So I tested a theory - I pulled the drain tube from the He3 and drained into 5-gallon buckets (ultimately into an old coleman cooler because it's about 2.5 buckets full). No F-06 codes, no problems (other than having to dump all that water). I ran 4 loads this way, without a single problem. It seemed obvious then that there was a semi-clog in the drainage pipe after the "Y" shared...