Remove the steamer knob by pulling it away from the machine. Dont lose the little metal bit which makes it stay on the steamer shaft. Also remove the silicone water supply to the steamer wand

Label the heater thermal switch connections (see photo). Then take a photo. THEN take them off.

This reveals a small crosshead for the earth to the heater, which is holding another thermal cut-out. Undo and remove the screw, this will release the thermal cutout, and you dont have to remove the earth connection.

You have exposed the heater itself. With an H5 Hex bit, losen the four bolts which hold the unit together (dont remove them). NOT the two bolts which hold the brass steamer wand.

This reveals a horsehoe shaped heater with two connections, slide these off and all the wiers are disconnected.

With a small spanner (Cant remember the size) remove the connector from the pump at the pump end as it is easy to get to.

Remove the steamer wand by undoing the bolt which is exposed - it is by the coffee press under the heater, not inside.

Finally lie the unit on its back and remove the 4 cross-head bolts to release the whole assembly.