What does error code E8 mean?

E8 is fault connection from CCU (Control board) to balancing sensor.

When you get E8, this is often because of a faulty control board.

Try first disconnecting power for a couple of minutes, to reset the appliance.

If you still get E8, then you need to call a technician. Testing is done jumping the two wires to the sensor to bypass the sensor, then replacing either sensor or control board.

Steve
September 2010