A couple of days ago I stuck the dishwasher on and it started surging and pulsing as if there was air in the line. There seemed to be a lot of water in the bottom tray. I checked the spray bars andthe drains but all seemed fine. The dishwasher is beeping and the LED is flashing on a 4 flash cycle. I dont have the manual to hand and so I cant check it.
Please help if you can.