Some Whirlpool washing machines may display the error FP. This error code means “drain failure”. If your washing machine is displaying this code it should still have some water stuck inside.
However, sometimes this type of error can be caused by the washing machine erroneously thinking the water hasn’t gone, but in reality it has. This can happen if the pressure system has a fault. So if you have error FP you need to decide if the water has pumped away or not.
If the drum is clearly full of water then it’s a pumping fault or blockage. However, if most of the water has gone but you can still see some sloshing around you need to work out if there is a pumping problem or is the water just there because it hasn’t spun. In this case try to remove the wash load and test without laundry inside. With no laundry inside all water should be pumped away. If not the washing machine isn’t pumping out properly.
So if you believe the error is caused because it isn’t pumping water away properly (or at all) then try troubleshooting here – washing machine won’t empty water (stuck full of water).
If the water is draining away OK (you can hear it for example) then check out for pressure system faults here – Faults on pressure system