F02 error code means water has leaked into base of the washer and has activated the flood switch in there which is causing the F02 error code.
What you need to do is pull the washer out and lean it backwards 45 degrees. This will allow the water to drain out from the base so you will need a towel from there.
Once the water is out the flood switch will reset itself and clear the error code.
But then you need to remove the top and back and find out what caused the water leak. Check the filter is tight and check the hoses and door seal and make sure theres no lose hoses or split hoses in there.
Check the above and see what you find as F02 on this means water has leaked into the base of the washer and has activated the flood switch.