hi raj, E3 is not heating the water fault.It may trip as the element will be open circuit and as the heater comes on it will trip.the element can be changed from the front on this model, just take off the front silver plate and it is to the front left.1x 7m nut holds it in. the part no is 806890358 and they are £24 plus vat and postage. All the best.
FOXY
October 2008