E4 Error i have found that the main problem with this, if you take the main panel off on the left there is a clear container with three pipes a switch and a solinoid.
the solinoid keeps getting stuck along with the switch, just turn it on, put on a program and with a bit of plastic or wood tap the solinoid on it body...... it should then work... remove and clean should be good now
richard
October 2012