Is there any dishwasher engineers on here?

As i am having a bit of trouble with ours, It will run through a programme but before after it had dryed the stuff it would bleep to say its finished but yesturday it never so i openned the door and the bottom of the dishwasher was still filled with water so i drianed it all out and check the waste pipe for any blocks but nothing I then run it through a quick rinse wash and it was fine so i put all the mugs and dishes in there run a full programme and it done the same when i openned it up it was filled with water

Anyone got any idea's??


Brian