i WOULD TEST THE WATER VALVE AND THE COILS FOR OHMS AND FOR FULL VOLTAGE
WATER INLET VALVE:
Check the water inlet valve
for any restrictions. You will need to shut off the valve from the household water supply before you disconnect the inlet tubing. Some water inlet valves may have a screen to filter debris before it can enter the valve. If the screen is plugged, water flow will be restricted and the result will be small or layered ice cubes. Remove and clean the screen or replace the valve. If dirt has gotten into the valve it may not shut off completely and will continuously drip water into the ice maker fill tube and will eventually freeze up. Low household water pressure or a restriction at the manual shut off valve will also cause the water inlet valve to not shut off completely and create this same condition. Self piercing saddle valves are the most common shut off valve to cause this problem as the hole that is pierced in the water line is often too small and will more easily become restricted.
The water inlet valve
is operated by line voltage supplied through the ice maker control. Power is applied for approximately 7-9 seconds during the harvest cycle and energizes the solenoid on the valve to allow water to flow.
You can check the solenoid for continuity with a multi-meter. On models with multiple solenoid inlet valves, you will need to determine which portion or portions of the valve are used for the ice maker. You can normally follow the inlet tubing from the ice maker back to the valve. Unplug the refrigerator and turn off the water supply to the valve before working with this part.
(HOW TO TEST INLET VALVE: Inspect the filter screen where the supply line connects. Remove any debris or deposits that may have built up using a toothbrush or warm running water. If you cannot clear theclog, it will be
necessary to replace the valve (the filter is not removable on most inlet valves). Test thewaterinletvalve for continuity using a multImeter. First, inspect the coil for an indication of it's ohm rating. If no information is printed on the coil, then use the range of 170 to 500 ohms. Set the multitester to the ohms setting X100 (if available, otherwise use the nearest ohm setting). Place a probe on each terminal. The multitester should display a reading that matches the coil's rating or if you don't know the rating then it should fall into the range of 170 to 500 ohms. If the water inlet valve does not pass this test, it should be replaced. If the inlet valve has two coils, test the second coil in the same way (note that they may not have the same ohm rating). The valve can also fail mechanically. So even if it passes the electrical test, it may still require replacement. If you have ruled out all other possibilities, go ahead and replace the valve.
Check the tap valve.A bad tap valve-the little device that connects the ice maker's water supply tube to the water pipe-may cause the problem where the ice maker's supply tube connects to the water pipe. If necessary, replace the inlet valve and the tap valve. For the tap valve, use the type that requires you to drill a 1/4-inch hole (as opposed to the "self-piercing" type). You can buy anice maker connection kitand do this yourself, or call a repair person or plumber to install an inline water filter when