my washer flooded the floor during fill cycle. it quit leaking soon as i turned it off. with the water supply still on and hooked up and the tub still full it won't leak as long as it is off. what is the problem?

Just a little more info in case you are not familiar with fill switches.

This switch is actually a pressure switch. It has a tube that runs down to the bottom of the tub, as water fills the tub, air is trapped in the tube. As the water rises, the air pressure in the tube increases until it reaches the switch's set point then the switch activates turning off the water and starting the agitate.

Possible problems.
1. Gunk blocking water from entering the tube. Remove the tube at the switch and blow into it to clear the plug. As richappy recommended.
2. Cracks or holes in the tube allowing the air to escape. Inspect the tube. Also check that it is tight on the switch, if not, cut off half an inch and re-seat it.
3. The switch is toast. Get a piece of tubing with the same internal diameter and attach this to the switch. Start a fill, then blow into the tube. You should be able to stop the water flow without blowing very hard.
If you cannot stop it the switch is toast.
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"it quit leaking soon as i turned it off"[/COLOR]
This is a bit of a concern as it should have stopped filling as soon as you turned it off. The above seems to indicate it took a short while to turn off the fill valve/s perhaps I am just misunderstanding this.