I have the above error message on my dishwasher and no reference in the handbook to what this means.

lawrence white, June 2005

hi
usualy means that the pump or the filter is blocked.
new pumps very cheap on ebay.

les, September 2011

I guess this thread is old, but maybe the answer will help someone else.

Quoted from http://www.fixya.com/support/t608691-candy_cdi_45_e4_code

"Solved it!! Make sure all water is pumped out of the machine. Switch it off at the wall and unplug. Tilt the machine forward (put a towel down first!) all the way till the door is on the floor, and let the rest of the water run out. Return upright, switch back on and Wahlah! it should work as normal. . . well ours did. Hope this helps "

George, August 2009

I have A9010 dishwasher and E4 means, that it is not able to discharge water

Tom, January 2006

Hi lawrence!
I have the same problem..
Have you solved it yet?
Pease help me if you can.
quantum@externet.hu

Zsolt, December 2005