Why Is My Tankless Water Heater Turning Off?

[@nuthin2sumthin474]

Glad I found your channel. WE bought our house and it hade a tankless water heater. It kept giving an error code as low gas. After 4 different brands and sizes, we had the gas company install a regulator. So now we are still having the same problem. We have 3/4 inch going in. We have 2lbs to the regulator and 10.5 oz to the tankless. When we turn on any water in the house it drops to 2oz. In order to keep this from happening, I have to lower the water by lever to only give so much water. We have had 199btuo, and 150 Bu with same issues. Should we go with a lower BTU to fix this?

[@willietaylor4803]

My tank less water heater want stay hot, enough to take a shower