Samsung DW80K7050US about 6 years old. Dishwasher Doesn't Drain...drain hose not plugged, changed drain pump (it was making a horrible humming noise), removed and cleaned everything in the tub, changed inner drain hose (it was cracked at the fitting). Have not recently installed anything...sump pump works, water gets to drain pump but does not get to the drain hose outlet. Something - a solenoid or a blockage in that white plastic housing that the inner drain hose and sink drain hose connects to? Should I change that part? Thanks!!

I ran the diagnostics and it gave the error code for "doesn't drain". Not very helpful but I've ruled out blockage ( I can pour water into the drain hose and if I pour enough in and elevate it, the water gets into the bowl inside the dishwasher). I verified the drain pump works...120v and it's spinning. The water doesn't move up the brake case when I turn it on and the drain pump activates so I'm almost positive it's a check valve problem. But, cannot find it on the dishwasher and can't find the part anywhere so I'm at a loss ...any ideas?