HI ALL, I HAVE A SERVIS 1500 AA, MODEL M6815W, AND I FIND THAT WHEN THE WASH GETS TO THE DRAIN STAGE, IT SEEMS TO BE PUMPING FOR AGES, BUT SOUNDS AS THOUGH THERE IS NO WATER LEFT TO PUMP OUT. I HAVE CHECKED THE DRAIN, AND IT IS CLEAR, CAN ANYONE TELL ME HOW LONG THIS PROCESS OF PUMPING OUT SHOULD LAST, AND IF I HAVE A PROBLEM, WHAT TO LOOK FOR, MANY THANKS