Category:Plumbing Question:lack of hot water from time to time in shower while hot water available every where else

Full Description:Love your show! My problem is that the master shower from time to time has no hot water. There are times it may last as long as a week. At other times the water is hot for weeks. There is hot water at every other faucet. This time around i checked the hot water tank, which was installed by the gas comapny one year ago. I noticed that the cold water pipe was actually hot. I woundered if they installed it wrong but after a few hours i noticed that the pipe was cold again. Is it possible that hot water is flowing the wrong way at times and why? When i dont have hot water in the shower, I noticed that if i turn on the cold faucet at the sink i do get a little more hot water. I also have base board heating.