I have a Fisher Paykel DD603 and only the top drawer does not drain. Rotor is fairly new. I have the integrated model so there is no digital display. When I place the top drawer into diagnostic mode, I can pump out all of the water but when it runs the cycle about 1/2" remains and the dishes are not cleaning. I have replaced the hose to the top drawer along with the flap valve so I know there is no obstruction. I have cleaned all of the inside so there is no inside obstruction.
Also, when it runs a cycle it seems like the arm will turn for only a few seconds and then turn off. It does this several times and then eventually it seems to run normally.
Could all of this be related to the control board. I have not yet switched the board for the bottom drawer with top drawer to see if this will make a difference.
This is driving me crazy. I would appreciate any help.