Noritz tankless water heaters exhibit numerical codes on the display screen when something is wrong.
Interpreting these codes and fixing them correctly is extremely important. Therefore, we are going to cover you today.
We know how infuriating it is when your heater suddenly stops working and shows a random code that you have never seen earlier. We are here to make things clear for you.
We will first enlighten you about how to take proper care of your unit and then discuss the common Noritz combi boiler error codes and how to fix them without employing professional service.
Knowing how to do Noritz tankless water heater troubleshooting can help you save a lot of time and money. So let’s take a look at Noritz error codes, what they mean, and how to solve them.
How To Take Proper Care Of The Noritz Heater?
To keep your device in tip-top condition, you should purge the port valves by connecting hose lines and opening the relevant purge port valves.
If you are fully ready and have a safe ejection area, it should be an easy procedure and eliminate waste from your machine.
On the flip side, you can also take advantage of pure white vinegar to clean out the water now that you have purged its lines.
The manufacturer recommends various draining and flushing methods, so make sure to follow them when cleaning out your appliance.
No matter which method you choose, avoid using punitive chemicals during the cleaning procedure because they will lead to destruction.
After completing the cleaning process, turn your unit on again. Do it slowly to get rid of any trapped air from the heater.
Do it by locating a tap furthest away from the unit and activating it slowly to remove the air safely.
Error Codes And Noritz Tankless Water Heater Troubleshooting
No Error Code
Sometimes the device does not function properly, but no numerical code is shown. It happens due to these problems:
- If the display does not exhibit the preset temperature when the unit is running, confirm that the power voltage, circuit boards, and remote controller readings are according to the specifications. Also, examine the fuse and wirings of the unit.
- If the fan does not operate when the warm water valve is opened, it means a water flow sensor is damaged, or the cold water thermistor detection is not functioning appropriately or set extremely high.
- If the outlet water temperature is wrong, ensure the heat exchangers and hot and cold water thermistors are working correctly.
Error Code 05
Problem: It means the time has come for the appliance to be serviced by a professional technician.
Error Code 10
Problem: If the power has dropped or gas combustion is still occurring even after the heater has been shut off.
Error Code 11
Problem: Ignition has failed in your appliance.
Error Code 12
Problem: This error code indicates that the burner flame is extremely low and insufficient to heat the device, or the flame rod does not sense a flame.
Error Code 14
Problem: This code tells you about the problem with the thermal fuse. It shows up due to the poor water quality and limited airflow.
Error Code 16
Problem: It specifies that the water temperature is extremely high.
Error Code 20
Problem: It appears when the high limit switch has been turned on.
Error Code 29
Problem: When these troubleshooting codes show up, the water level has surpassed the correct level because the water level neutralizer is not draining properly.
Error Code 31
Problem: When this code displays on the screen, it means something is wrong with the inlet thermistor.
Error Code 32
Problem: The outlet pipe’s warm water thermistor has broken down.
Error Code 33
Problem: The heat exchanger thermistor has failed.
Error Code 45
Problem: There is a water leakage issue.
Error Code 59
Problem: This code informs you about the low input BTU and combustion issues.
Error Code 61
Problem: It enlightens you about the failure of the fan motor.
Error Code 65
Problem: It shows up when the main flow control valve has failed.
Error Code 66
Problem: There is an issue with the bypass flow control valve.
Error Code 67
Problem: It tells you about the faulty air-gas mixer.
Error Code 70
Problem: It means the circuit board has malfunctioned.
Error Code 71
Problem: The gas valve drive circuit is defective.
Error Code 72
Problem: It indicates that the flame rod senses the fire without the ignition categorization.
Error Code 73
Problem: The circuit board settings are incorrect. If you have replaced the dip switch or changed a jumper connection while the power was distributed to the device, this problem can occur. An incorrectly programmed circuit board can also trigger this issue.
Error Code F76
Problem: It means there is miscommunication between your heaters (if you have more than one) that are linked with a quick connect cord. More than one remotes connected to the devices can instigate this issue.
Error Code 760
Problem: It informs you about the remote control problem.
Error Code 90 And 91
Problem: The gas combustion is abnormal.
Error Code 92 And 93
Problem: Neutralizer has reached the end of its lifespan.
As you can see, numerous things can go wrong with a Nortiz tankless water heater.
These issues don’t occur frequently but need immediate attention when they do.
You can fix many of them yourself if you feel confident enough.
However, if you are unsure, we recommend hiring expert services for Noritz tankless water heater troubleshooting.
We are optimistic you enjoyed our thorough guide on how to reset the Noritz tankless water heater.
If you have any questions or concerns, leave us a comment.