I assumed that it would not start because it could not pump out the old water... made some noises, like a very rapid clicking... indicative of something trying to electrically start but not actually happening. I checked the filters... all clean. I checked the drain hose... clear. Nothing in the way at the pump. I removed and took the pump apart enough to get to the impeller and found that there was no resistance. I ordered the replacement on Wed night, upgraded to 2nd day shipping, received the new pump on Friday. Installed new pump, washer worked as it should. Disassembly, diagnosis, reassembly took a total of less than an hour, with standard hand tools. The only caution... do not discard an old pump until you get the new one... you will need the large metal counterbalance off of the old pump.