on a zanussi fjs 1025 w the code  E 40 means door not closed if you check yours and it is, replace door interlock
codes are: 
E10 PROBLEM WITH WATER SUPPLY
E20 PROBLEM WITH WATER (DRAINING)
E40 DOOR NOT CLOSED
EFO FILTER IS BLOCKED
                
 wirecutterman
                
 February 2008