I get this question a lot. Washer is flooding the house, water everywhere, won't stop. The first thing I say is unplug the washer. If the water is still coming in,(which it will on a stuck valve) shut off the water faucets. If that is not possible shut the water meter off. If you can stop the washer with the timer then I would say instead of a bad valve you have a plugged water level pressure hose. Look at this diagram:
As you can see the rubber tube from the bottom of the tub allows air pressure to push against the switch till it shuts down the valve and starts the wash cycle. Remedy this problem: Simply remove the tube from the switch and blow it out. Use them lungs!. Get that sand and trash out of the sump. Reconnect the hose tightly and pump out any standing water. Then restart the machine. If you have a good tight connection the machine should start working like normal. No parts needed! LOL!