My 12 year old Kenmore double door refrig has an icemaker that doesn't work, but the water dispenser works well. I tried the hair dryer on the water tube by the icemaker but no luck. I removed the water valve and the valve solenoid for the water is 400 ohms and the one for the icemaker is 100 ohms. Are these numbers normal? Also the water lines look clean and unclogged. Thanks