You are right the dishwasher should not be filling during the drain cycle.
This is either caused by the fill valve not closing or the electronic control.
The fill valve may be sticking open.
To check this start the dishwasher and let it start to fill.
Let it fill for a few second and then open the door to see if water is still coming in to the dishwasher.
If water is still come in with the door opened replace the fill valve.
If the water stop when you open the door your control is faulty.
Here is a link to your dishwasher model FDB1050REB2. |