It often means a drain pump issue - depending on the machine I suppose - you don't say...
Before you make any great effort - remove the filters at the bottom - empty the sump of water - bail it out with a coffee cup.
Remove the single Torx screw that holds the plastic cover and clear the debris away from the impeller of the pump.
Minimum effort - no cost and it may very well solve your AL03 problem.
Good Luck..., February 2016
