Hi all, as the title says. tonight while my son was using the faucet in the downstairs bathroom, it suddenly stopped working. I was able to replicate it myself. when the hot water faucet is left on for a few secs. it suddenly makes a banging noise and then the water stops flowing. this only affects the hot water side. I checked the other faucets in the houe and everything else is working fine. I took the stem out and turned on the water and there was no issues. the stem looked fine with no deposits. when I increased the water flow via the stop valve underneath the sink it seems to have corrected the problem. what would cause this problem? never had a problem until tonight. thanks