richard blaine
New Member
Hi, I have a 50 Gallon Ruud Achiever - Professional, gas with conventional thermostat, just over 1 year old, purchased by the previous homeowner. I only use the hot water once per day for a bath or shower. When I turn on the hot water, the pilot fires the burner and the water is hot. After a few minutes, the water gets colder: it goes from hot to warm, while the burner is still on. Then I shut off the hot water, and the burner stays on for at least 10 minutes. After about 30 minutes, I run the bath again, the burner fires and the water stays hot. It seems the tank runs out of residual hot water and does not heat up the incoming cold water fast enough. The plumber checked the dip tube (which is fine) and said the water should be consistently hot as long as the burner has fired and remains on.