Built in modle 665 does not drain

I am assuming that the modle 665 you are refering to is the first 3 characters of the model number???
if your unit is making all the normal noises it should make when draining, yet is not ejecting any water, or is leaving some and another drain cycle is necessary to remove all water the drain tube that screws into the pump/motor assembly may be cloged with larger than recommend particles that have made their way to it.. usually things like cupboard door bumpers that fall off into the unit get ground down till they fit through the chopper plate but are still to large to fit easily through that tube..
remove the kick plate below the units door, place a pan, etc under the drain hose where it connects to the tube, remove the hose, then unscrew the tube and check for obstructions..
hope this helps.
best of luck,
ttfn