The electronic control board and provided temperature controller ensure better accuracy, stable operation, control, monitoring, and diagnostics, making troubleshooting easier and quicker.
While their products can be costly, their reliability is also good.
However, the basics of changing the temperatures on all water heaters are pretty much the same.
Rinnai Tankless Water Heaters control water temperature precisely, which prevents dangerous temperature levels and spikes.
Error Code 03: Power interruption during Bath fill Rinnai error code 03 indicates that there has been a power interruption or outage while the Rinnai water heater happens when in use.
If there is a dedicated return line in the house, a recirculation pump will move the water from the heater through the return line and back.