Too much water going into tray
How do you turn down the amount of water going into the tray?
There is a little water level on the control on the side of the icemaker you have to take the front cover off the icemaker to access it. However I don’t recommend trying to adjust this if the icemaker is overflowing. This adjustment is just supposed to be for adjusting the size of the cubes, not for compensating for overflow.
The water valve is more than likely bad and needs replacing. The icemaker can cause this but I find that the water valve causes this a lot more often.
You can test this by following these steps.
Make a jumper wire by skinning a short piece of insulated wire about ½ inch on each end.
Locate the test holes on the front of the icemaker by removing the front cover.
Place one end of the jumper in the test hole L and the other in test hole V.
When this jumper is in place water will flow into the icemaker. When the water starts to flow remove the jumper wire. As soon as you remove the jumper the water should stop. If the water continues to run when you remove the jumper the water valve is bad. If not repeat the test several times. If the valve never fails to stop the water flow replace the icemaker.