We have a fridge that has the ice and water dispenser on the front. Up until about a month ago it worked great. Then it stopped. But we discovered that if you turn the faucet on, and then try to get water from the dispenser it works. So, I'm guessing there is something in the fridge floating loose in the water system that blocks the flow unless their is a drop in water pressure to disturb it. Or there is a flow control value that is misbehaving.
Anyone here have experience with such things that might be able to give me some hints in tracking down and fixing the problem?