HOW TO FIX ERROR CODE 73

Improper circuit board settings will cause a code 73 error. Changing a jumper connection or dip switch while power is supplied to the heater can trigger the problem, as can an improperly programmed circuit board.

Rinnai error code 79 indicates a water leak The leak can be caused by condensation, a faulty heat exchanger, or other internal leaks. ...

When we have a Navien error code E004. There might be different issues with it. - blockage in the venting system.If you have a blockage,...

EC16 or Error Code 16 The 16 error code occurs when the outlet water temperature spikes to an abnormally high value. The heater will...