AL03 is a Timeout on Drain. Check the drain hose isn't blocked.
Or.
Try resetting the machine by pressing the Program button and the Power on button at the same time. It will beep a few times. Close the door and let it run a minute. Power down and restart. If that doesn't help it may be the pressure switch is failing.
regards Tony
www.keepingupappliances.com
Tony
September 2007