Mod no dw602(7636533842)
This dishwasher is only operating the lower spray arm. Half load option not on. Pressure on lower spray arm is very good. I had a look for diverter valve on connections but could not see one.Paul
Have had problems with top basket not going back & seating/locating correctly, also the pipe out at sump area, blockages in spray arm or hose to spray arm.
Reading the quick quide to operating the appliance :-
Select 1/2 load when using any washing programme (except prewash) to save on water, electricity & time if the machine is only half full. You can place dishes anywhere in the machine.
No diverter in it Paul, try taking out the circulation pump & checking it for blockages, could be a plastic wrapper in impellor.