I have a reliance 501 heater which was installed new about 3 or 4 years ago. It does not seem to make hot water the way it should from the very start. It puts out hot water ok, at first, but runs out within about 10 minutes or so when showering. I just heard on the news this morning that many companies have a recall out on heaters made between 1993 and 1996 due to a problem with the cold water inlet tube breaking and the heater not operating properly. If reliance is one of the companies, could you let me know and what is needed to fix it.