cindy g
New Member
I have a Nortiz tankless water heater (natural gas, 199, 900 BTU max 16,000 BTU min, up to 11.1 GPM) installed about 7 months ago. Everything was working well until about 3 wks ago when all water (showers and kitchen) are just medium luke warm. Temp was set at 125F so the plumber inc to 130F which helped but still not hot. Temp was then inc. to 140F but still didn't do much. Called Nortiz to trouble shoot and was told that the incoming water temp was 65F and outcoming is what was set at ie. 140F , the shower flow rate is 0.6g/min which is low. Tried to dec. temp to 120F but didn't help. They concluded that it's not the heater problem. One person suggested that I try decrease temp to 110F since the shower flow rate is very slow. What could this be?