Here are some troubleshooting steps to take before you replace the solenoid water valve:
If the water valve operates properly and fills the ice maker during the test cycle, then it will not have to be replaced. If it buzzes and does not fill the ice maker, then you could have a failed valve. You can access the valve by unplugging the refrigerator and removing the bottom panel on the back of the refrigerator. Remove the wires from the ice maker water valve. The ice maker water valve has the tan and white wires attached. Using a volt ohm meter, check the resistance across the leads of the water valve. You should read about 300 ohms. If not then the coil is bad and the valve will need to be replaced. If you do read 300 ohms, you may still have a clog or mechanical failure in the valve. You may try switching the wires from the dispenser valve over to the ice maker valve. Plug the refrigerator back in and see if the ice maker will fill when you push the water dispenser lever (you will need to hold the freezer door switch in to conduct this test). Be sure to unplug the refrigerator and switch the wires back to the dispenser valve following this test.
If the water valve is good but is not being energized during the test, then you could have a bad ice maker module or a wiring failure between the module and the water valve. You can check the wiring by measuring the resistance between the test points V and N (with the refrigerator unplugged). You should measure about 300 ohms through this circuit.
Replace the cover on the ice maker when your tests are complete.
If the water valve needs to be replaced, follow these steps:
If you need to order the water valve, you can get it from the Sears PartsDirect website www.searspartsdirect.com
. The part number is 4389177.
If you need more help with this repair, resubmit your question with additional details.