AEG Favorit 80800 Service Manual page 5

Failure of middle spray arm
The middle spray arm is monitored by a Hall (magnetic) sensor situated in the
inner door panel.
This sensor is actioned by a very weak magnet in one end of the middle spray
arm.
As the magnet at the end of the spray arm passes the Hall sensor a voltage of
4.5 volts is generated which is monitored at the electronic.
If the electronic does not detect 4 revolutions in 40 seconds the spray arm LED
illuminates and the buzzer sounds.
Hall sensor for spray arm