No water to ice maker

Turn off refrig water supply, remove cardboard rear lower cover, disconnect two plastic lines (one for icemaker, the other for in-the-door water dispenser) and one copper fitting (supply line). Replace valve (mounted with one screw), reconnect, test for leaks.

The valve I was so sure was bad wasn't, replacing it didn't solve my problem. Turned out to be a frozen up icermaker water feed tube at the top rear of the refrig. The Fix: heat a metal rod of appropriate size in boiling water or with a hair dryer, poke it gently up into the water drop tube (sticks out just above the rear of the icemaker) from the inside and melt out the ice plug. Be sure to test this tube if you have the same problem, you should be able to disconnect the line on back of the refrig and blow air through the tube if it's clear. Saved the valve anyway for a spare.