Dishwasher will not drain

[rhartzell]

Model Number:
Brand: Brand
Age: Less than 1 year

Model Number: GDT580SMF2ES
Brand: GE
Age: 1-5 years

I have a GE GDT580SMF2ES dishwasher that will not drain. No blockage, replaced the drain pump and the floodswitch assembly (float). Still has standing water. I am at a loss what to try next?