I can tell you exactly what is happening. The main drive wheel on your ice maker has a small copper plate mounted behind it. This plate makes contact with the printed circuit board and energizes the water valve for 7 and ahalf seconds. Over time the copper plate will actually stick causing excessive water overfilling and flooding the ice maker mold. You probably need a new icemaker. But try and carefully remove that main drive gear(The one that has do not rotate manually printed on it) and clean the copper plate. Put the gear back and see what happens. To bypass the thermostat and iniate a harvest cycle to see how much water comes out you must put a jumper between T and H. Listen for a Click and remove the jumper. Let the wheel go all the way around and count how many seconds water comes in . It should be 7.5 seconds. This will happen very near the end of the cycle so be patient.