Hello. I have a Hotpoint side by side HSM25GFTA SA with a water dispenser problem. When you push in to dispense water it works, but when you remove the cup water keeps flowing. When this happened i panicked and tried the switch in and out a couple times and it did not stop, until i pushed the White dispenser tube(somehow pushing the tube stopped the flow). This happened several times and almost always pushing up on the white tube stops it. Any ideas what part I should change? The icemaker works fine when the setting is pressed to ICE. Thanks, i appreciate any advice.