Comment: I have had a Rinnai tankless heater for 6 years and have never had it serviced. The men who installed it never mentioned it to me and I was remiss in reading the owner's manual. The fact that I have not had it maintained is affecting the water pressure of the hot water. It still heats but the pressure is really bad. <br /><br /><br />
Comment: the thurmal coupling is bad and it is telling the hot water tank that there is not enough gas so it turns the hot water tank off it flashes 11