First I replaced the filter thinking it was the problem, but that was not the case. Next was replace water supply valve at the back of the refrigerator. It was very easy. The only thing that was in question was how to get the refrigerator side line off of the existing valve. There is a plastic slide clip that you remove and pull the line out and press the line back into the port it came out of. It was a very simple project and took about 20 minutes.