Rheem Tankless Water Heater E5 Code indicates the water flow is too much, and the unit can’t keep up with the demand. As a result, your tankless water heater fails to produce enough hot water and throws the fault code E5.  Limiting the water flow, you can clear the error code E5. You can install … Continue reading Rheem Tankless Water Heater E5 Code (Too Much Water Flow)