Bosch DW won't drain

Ser # F9860200314
Had this unit ~6 yrs now. ~4 yrs ago replaced control board because of solder overheating.

Now new problem. Won’t drain. Took apart left side and plastic water tubing manifold not clogged, drain tube flows, blue plastic wheel in sump spins freely, can hear that pump cycles forward and reverse when I use cancel cycle/drain shortcut, but no water pumps out.

Can anyone link me to instructions to remove the pumps on this model so I can see if clogged inside? Saw some of the other posts with similar issues but this model looks different than those described in the break-downs.
Tony