E3 error code on baumatic bdw13?

If the element & thermostat are definitely ok then it probably isn't getting power supplied when it is supposed to be heating. You need to check the wiring from the panel down to the element to make sure it does not have a break in it and then check that power is getting to the element. If not then there may be a fault on the control board.

Lincoln Appliance NZ
February 2014