I have had warrant work done twice on this unit the water valve and fill hose one the third time tech said he saw the unit siphoning.
On the first pre wash the unit does not fill with enough water most of the time I open the door and add water with the spray hose it works fine the rest of the cycles. Why would it siphon just on the pre wash?
I have used the drain systems for 30 years know problem. I have a loop on the drain line above the dishwasher. It drain to the drain in the basement. I do not see it siphoning. What can I fix he will not come back says it is my drain systems.