AEG washing machine error code e40 - AEG Lavamat 74640 Front Load Washer

E40 relates to the door being left open when the programme is started, it maybe that the latch was not pushed over when the door was shut.After the door is closed again the fault should go away. If it does not and you hear alot of clicking from the door lock you may just have a door lock at fault.Code E40 is door not closed, could be a mis-aligned door or faulty door switch.-------------But if door is closing properly and you are confirmed that door is getting properly locked, then other possibility can be gunked filter or blocked drain pump.It requires cleaning internally.The procedure is as follows:--- Towards the bottom right of the machine is a pull-down flap.
Drain the machine - there's a tube at the bottom of the machine
with a plastic plug - you'll see a butterfly handle, pull hard; the plug
is a round ball on the end of a stick.
Unscrew the large diameter thing (pump cover) -
Don't do this before the drain step!!!
Withdraw the filter cylinder and remove any gunge - the
filter port has two ports - the left one is the impellor
pump and the right one is the discharge pipe; feel to ensure
these are not gunged up either.
Reassemble in reverse order - as Haynes say.
Almost every programme necessitates a pump activation to
assure that the machine is empty of water .-----------

E40 is a code error that indicate fault in the door,
E- error
40-inter door lock or switch
to solve the problem get another switch or by pass it if need be,
pls this by pass is commended for technician only. for further assistant pls contact.

Most Likely , its the Door interlock , Replace it and all will be ok , i have the same issue exactly with AEG washing machine , Clicking door switch while door is already closed ! . Need to replace it .