A few days ago realized I had no hot water, called our gas and electric service and they came out and relit the pilot light, for a few days everything was OK, and then about 4 days later no hot water again had it relit a second time and the same day no hot water does this mean that my hot water heater has played out, my friend told me that maybe the regulator was bad ?

Mine did the same thing! Make shure there is unrestricted air flow on bottom of heater . Clean lint etc. with brush . The new heaters are like cars air and gas mixture must be exact... plainstiger