The E4 code means - Overfilled. To much inlet water. Remove water manually from the tank pan and try operating a new cleaning cycle. Good luck !
Code E4 basically amounts to a float switch in the bottom of the dishwasher being lifted by standing water. Remove the kick board from your kitchen units so you can get access to the bottom of the dishwasher below the door. There's two black plastic covers which pop off using a flat head screw driver. Remove the left one. With the power switched off, get a torch and you'll see just inside a polystyrene float switch sat on the top of a small amount of water stood in the bottom of the machine. Get a dry cloth and use it to sponge up the water, wringing it out into a bucket or nearby sink. It may take a few goes to soak up the water. Once the water has gone, the float switch will rest back on the base of the machine and error E4 will disappear.
I haven't used the dishwasher (BEaumatic) for a while and when I open it there was some water left on the bottom of the machine. I cleaned the filter and put it back to try to run it again but after a fiwe seconds it trips to ECB. This seems to happen only during the wahsing part of the cycle as when machine is run for just the drying process it runs without a problem
Please let me know what you think the problem is and if the part need to be replaced how much would it cost.
I cleared my E4 code by manually removing water, cleaning filters and running a rinse cycle twice.
OK - sorted it finally!
If you, like me, had actually added water thinking that this would rinse the machine through... doh! you had inadvertantly made water fill the cavity at the bottom of the maching. This is situated behind the kick-board. There are 2 black plastic panels - if you remove these, (they just pop out) and sponge out the water that is activating the dip switch (there is a polystirene float) that activates the pump - this resolves the E4 error code.
Make sure you do it while the machine is off! The reason the base of the machine has filled with water may need further investigation, but mine was most definitely user error. Who'd of thought adding water to a dishwasher could have been so fatal! It nearly cost me £88 call out charge too after the helpline weren't able to help me.
Usually answered in minutes!