Watched Appliance Parts Pros videos trying to diagnose the problem. I also submitted a description of our problem to the help desk (an infrequent vibrating noise and low flow rate coming from the water dispenser) The Appliance Parts Pros team suggested replacing the water filter head. Ordered the part plus a new water filter. Parts came about a week later. Replaced them today. The video on replacing the head was very helpful. The water dispenser is working like new now.