automatic ice maker not functioning

Observing the ice maker itself was working, and that water was flowing to the dual inlet water valve, I assumed the problem must be a faulty outflow valve. If either of the two valves do not close completely, the water slowly accumulates in the plastic line and freezes as it enters the freezer compartment. A solid plug of ice will form in the line, either causing no water to enter the ice tray, or it may leak under pressure when the valve opens briefly (as was my case). The solution was simple: change the dual inlet valve, and while this took me approximately 15 minutes to 1)turn off electricity and water to the frig, and 2)replace the part, the plastic tube going to the ice tray warmed up enough as I watched a one inch plug of ice exit the tubing. Once the power and water was turned on, and I checked for leaks, the ice maker worked like new! Not bad for a $30 fix.