We have a Viking DFUD142 (DW20.3) that is 5 years old and it has never drained properly. We followed all the directions to the letter and we can't figure out what to do next. There is also a ter

SOURCE: My Viking dishwasher (~2 yrs old) won't complete a

if is continueously running because the unit is trying to get rid of the water in this instance shut off the water and shut off the electrical breaker disconnect the drain hose and assure that there is nothing blocking the end of the hose that goes to your sink or garbage disposal if this is clear you would de install the unit and pull the whole unit outward. you would then follow that same drain line to its oppisite end and check for any obstrcutions there as well if there are not you would try to disassemlbe the drain pump which will definetly make the water come out of the machine when you do this so you may want to use a shop vac to empty the water down the bottom of the machine before taking off the drain pump you can actually do a bench test on the drain pump or you can leave the pump inside of the machine after you assure that nothing is blocking the impellar of the pump and hit the cancel button or set the unit to drain depending on which you have controls are differnt in some models if the pump doesnt turn on then you would replace the pump if it does you would then to the inside of the machine and do a continuity test on the float switch to assure this is working properly and the float is not jammed in a position run these tests and checks and message me back with your finds and please remember when our chat has fully concluded to rank how this opinion has helped it allows me to help others in the future Thanks Rick

SOURCE: viking Professional Dishwasher - dfud142

more than likely the door saftey switch is broken, check your owners manual