How to Reset Rinnai Tankless Water Heaters-2022

If you want to buy a Rinnai Tankless water heaters, congratulations! You should expect reliable performance from the water heater.

Rinnai Tankless Water Heaters
Rinnai Tankless Water Heaters

If you encounter any problems with your Rinnai tankless water heater, an error code will appear on the display panel. Troubleshooting is a process that is done only after a few careful steps. This can be done quickly for some units but for others it might take a little longer. Even if you’re prepared to call for professional help, it’s still better that you identify the problem first.

Are Rinnai water heaters a dependable choice?

Rinnai tankless water heaters are designed to be installed in commercial and residential settings. When you’re faced with a problem, you should be able to reset the unit quickly and easily. The heat exchanger is made from high-quality materials, and provides a 12-year limited warranty.Rinnai is a Japanese company that has been manufacturing water heaters for some time now. You shouldn’t worry about your family’s safe water supply. Either way, the units come with the owner’s manual that provides enough information for identifying the troubleshooting of the water you need to check the manual.

How many error codes can Rinnai water heaters have?

There are many error codes that Rinnai tankless water heaters unit can display, which range from 02 to 79. The list also includes No Error Code, Code FF, and code LC, etc.

For the control unit, you can use the reset button, located on the top of the unit, to reset the water heater back to its factory settings. You press and hold the Connect button on your module until you see the LED blinking white. Then, wait until it stops. Afterwards, keep holding the Connect button until the LED blinks blue again.

Rinnai Tankless Water Heaters
Rinnai Tankless Water Heaters

What is the factory reset for Rinnai tankless water heaters?

The Factory Reset will restore the module to the factory default values. The Factory resetting will delete all of your current settings and wireless network history.

To reset your wireless network and ensure that your router recognizes the new network, you will need to perform a Factory Reset. Once again, you should factory reset first and continue with the pairing process.

Start with pressing and holding the Connect button on the module until the LED blinks white. Once you release it, the module will reboot, whereas the module LED blinks red when it’s all done.

Rinnai Tankless water heaters Error Codes.

Code 02: No burner operation during freeze protection mode.

Call plumber

Code 03: Power interruption during bath fill

Start with pressing and holding the Connect button on the module until the LED blinks white. Once you release it, the module will reboot, whereas the module LED blinks red when it’s all done.

Code 10: Exhaust or air supply blocked

There are several things you can do before calling a plumber. Try the following:

Before writing, I check whether my venting material is acceptable in Rinnai. I replace it if necessary.

  • Look for blockages in the flue or exhaust.
  • Is the connection between the vent and the condenser loose?
  • Check the condensation collar for proper installation.
  • The dip switches need to be set correctly,
  •  Is the fan rotating properly, or is something blocking it?
  •  If the error code still displays, call a plumber.


 Code 11: Ignition problems

Because this has to do with gas and gas lines, most people will need to call a plumber. However, these are steps the plumber will take and you should carefully try.

  • Is the gas turned on? Check at the gas meter, gas valve, gas cylinder, gas line and regulator.
  • Is the gas the correct type and pressure?
  • Is the gas pipe, meter and/or regulator sized properly?
  • Have a plumber bleed the air from the lines.
  • Are the dip switches set?
  • Is the appliance grounded?
  • Disconnect EZConnect™ or MSA controls to see if you can isolate the problem.

If you are not familiar with these parts and with both wiring and gas, you should hire a plumber to deal with a Rinnai error code 11.

Code 12: Fault in the cooling system

Code 14: Fault in the fan and heater control unit

Code 16: Fault in the thermostat unit

Code 32: Fault in the water temperature sensor

Code 33: Heat Exchanger Outgoing Temperature Sensor Fault

Code 34: Combustion Air Temperature Sensor Fault

Code 52: Modulating Solenoid Valve Signal Abnormal

Code 61: Combustion Fan Failure

Code 69: Control Arm Fault

Code 70: Control Valve Position Fault

Code 71: Solenoid Valve Circuit Fault

Code 72: Flame Sensing Device Fault

Code 00 or “LC”: Scale Buildup in Heat Exch

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