Noritz Tankless Water Heater Error Codes
Model Families
| Family | Name | Fuel | Models |
|---|---|---|---|
| CB | Noritz CB Condensing Combi-Boiler | gas | 1 |
| EZ | Noritz EZ Series Condensing Tankless | gas | 1 |
| NCB | NCB-240E | gas | 10 |
| NCC | NCC-180E | dual_fuel | 2 |
| NCG | NCG-180E | gas | 1 |
| NPE | NPE-211 | electric | 13 |
| NR | NR-50, NR-81, NR-111 | gas | 2 |
| NRC | Noritz NRC Condensing Tankless | gas | 1 |
| NRCP | Noritz NRCP High Efficiency Condensing Tankless | gas | 1 |
| NRCR | Noritz NRCR Condensing with Recirculation | gas | 1 |
Error Codes
| Code | Description | Severity |
|---|---|---|
| 10 | Flame Failure | Warning |
| 11 | Ignition Failure | Warning |
| 12 | Flame Loss | Warning |
| 14 | Thermal Fuse Failure | Warning |
| 16 | Over-Temperature | Warning |
| 29 | Condensate Drain Issue | Warning |
| 31 | Inlet Thermistor Failure | Warning |
| 32 | Outlet Thermistor Failure | Warning |
| 33 | Heat Exchanger Thermistor Failure | Warning |
| 43 | Water Level/Neutralizer Issue | Warning |
| 45 | Water Leak Detected | Warning |
| 51 | Fan Motor Failure | Warning |
| 52 | Exhaust Blockage | Warning |
| 59 | Overheating Abnormality | Warning |
| 61 | Fan Motor Failure | Warning |
| 65 | Main Flow Control Valve Abnormality | Warning |
| 66 | Bypass Flow Control Valve Failure | Warning |
| 70 | Circuit Board Fault | Warning |
| 71 | Gas Valve Drive Circuit Abnormality | Warning |
| 72 | Flame Rod/Gas Valve Issue | Warning |
| 73 | Circuit Board Setting Error | Warning |
| 90 | Combustion Abnormality | Warning |
| 92 | Neutralizer Life Cycle Alert | Warning |