It only takes two tools to replace this Valve Assembly. I think the most trouble is getting the Refrigerator moved out to reach the part location. Turn off the water, disconnect the water supply line; disconnect the water line from the valve that feeds the actual ice maker. Remove the only screw that holds the part in place. Reconnect the ice maker feed line, then hook everything back together. Turn on the water supply and check for any leaks. (this is important!). Then wait for the system to make ice.