Error code EF8 on your AEG washing machine indicates a problem with the appliance's water inlet. This may be because the inlet is blocked, or there's an issue with the pressure sensor. Here are some steps to fix it:
1. Turn off and unplug your washing machine.
2. Check if the water tap is turned on and if the inlet hose is not kinked.
3. Clean the water inlet filter if it is clogged. You can find it where the water hose connects to the machine.
4. If the problem persists after cleaning, it might be a pressure sensor issue. In this case, contact a professional technician for further assistance.