A few days ago my kitchen sinks hot water shut off. Hot water is running every where else. I checked the valve and it was turned on. I then disconnected the hose and ran hot water through a spare hose, worked fine. Reconnected using the spare how's, no hot water in the sink. I replaced the faucet with a new one, same problem with the hot water. I switched the cold water hose to the hot pipe and vice versa. Now the cold water is out. Anyone have any idea what might be going on? I'm at a lose.