I recently replaced my water filter on my Kitchenaid side-by-side refrigerator, model KSCS251, and since then my icemaker no longer makes ice, nor do I hear any water flow into it. The water, however, does flow out of the dispenser and the water filter is full. I don't see any arm that regulates the flow of water into the icemaker and I can't find a diagram of the water line to see if anything is causing it to be plugged. Can you help?

Try swapping the wires on the dual water inlet valve. It's on the back where the water supply comes in. Then try the water dispenser. The water should go to the ice maker. This will tell you weather or not the ice maker valve is working and if the line is clear.

The water inlet valve on the back of unit opens when the ice maker needs water. If the valve doesn't seal good because of sediment or wear it will continue to drip and when the water reaches the ice maker supply tube it will freeze blocking the fill tube.. You can take the water line off the valve and watch to see if it drips