F5 is a draining problem on this washer.
What you need to do is remove the plastic trim on the front at the bottom and there on the rigth hand side you will see the filter.
Remove this and give it a god clean out. But you may find this is full of water still so get a shallow tray under there and slacken the filter to slowerly drain the water out.
Once the water is out you can then fully remove the filter and give it a good clean out. Then look inside the chamber were the filter goes and at the back in there is the impeller X shape. Check theres nothing stuck in there stopping the impeller from turning.
Once thats all clear refit the filter and retry the washer and fingers crossed that sorted it.
But the F5 error code is a drianing issue on this.