What does code 12 mean on a tankless water heater?

flame failure
Error Code 12 relates to flame failure which is when the heater can’t maintain a flame. You should check that the system is receiving gas that’s the right pressure and type. Also, check for carbon buildup in the flame rod and bleed excess air from the gas lines.

What does an error code 11 mean on a tankless water heater?

When there is a malfunction, an error code will appear on the LCD display. Bosh fault code 11 – Indicates a problem with the tankless water heater’s ignition. Typically, if you receive this fault code, your unit will not work. Before calling a licensed plumber, check to make sure your gas valve is open and supplying gas to the unit.

Is there an error code on my Noritz tankless water heater?

Owners of Noritz tankless water heaters may come across some of the error messages Noritz tankless water heaters can display, and they may or may not indicate a serious problem. An audible “ beeping ” alarm usually accompanies an error code.

What is the Rinnai fault code for a tankless water heater?

Definitions of Rinnai Tankless Water Heater Codes Rinnai fault code 02 – No burner operation during freeze protection mode. Rinnai fault code 10 – Air supply or exhaust blockage. Rinnai fault code 11 – No ignition. Rinnai fault code 16 – Over temperature warning. Rinnai fault code 32 – Outgoing water temperature sensor fault.

What is the fault code on a Bosch tankless water heater?

Definitions of Bosch Tankless Water Heater Error Codes Bosh fault code 11 – Indicates a problem with the tankless water heater’s ignition. Bosch fault code 29 – Indicates a possible clog in the unit’s neutralizer. Bosch fault code 90 – Indicates low gas supply pressure.

Is there an error code on my navien tankless water heater?

If you have no hot water, you may have overwhelmed your tankless water heater’s capacity or have at least one error code. This guide will discuss and go over the Navien tankless water heater error codes, their meaning, troubleshooting, and more.

What does the Rheem code 31 mean on a water heater?

Rheem error code 31 indicates a malfunction with the water inlet thermistor. The Rheem error code 31 can be caused by scale build-up on the inlet water filter or any thermistors, damaged or bad wiring, and short circuits. You may need to replace the thermistor or the PCB.

What does the Rheem error code 29 mean?

Rheem error code 29 indicates that the outlet temperature is too low. If your Rheem displays an error code 29, ensure the heat exchanger is clean of any build-ups. Clean the inlet filter if necessary. You may need to replace the heat exchanger thermistor or PCB.

What does it mean when Rheem says error code 51?

Rheem error code 51 indicates a problem with the gas inlet solenoid valve. If your Rheem displays an error code 51, ensure the gas valve wiring is in good working condition and installed correctly. The gas control assembly, the main burner, the flame rod electrodes, or the PCB may need to be replaced.