| 03 | Rinnai Tankless Water Heater Error Code 03: How to Fix It | medium | Medium |
| 05 | Rinnai Tankless Water Heater Error Code 05: How to Fix It | medium | Medium |
| 10 | Rinnai Tankless Water Heater Error Code 10: How to Fix It | high | Medium |
| 11 | Rinnai Water Heater Error Code 11: How to Fix It | critical | Medium |
| 12 | Rinnai Water Heater Error Code 12: How to Fix It | critical | Medium |
| 13 | Rinnai Water Heater Error Code 13: How to Fix It | medium | Medium |
| 14 | Rinnai Water Heater Error Code 14: How to Fix It | critical | Medium |
| 15 | Rinnai Water Heater Error Code 15: How to Fix It | medium | Medium |
| 16 | Rinnai Water Heater Error Code 16: How to Fix It | high | Medium |
| 19 | Rinnai Water Heater Error Code 19: How to Fix It | medium | Medium |
| 20 | Rinnai Water Heater Error Code 20: How to Fix It | medium | Medium |
| 21 | Rinnai Water Heater Error Code 21: How to Fix It | medium | Medium |
| 22 | Rinnai Water Heater Error Code 22: How to Fix It | medium | Easy |
| 24 | Rinnai Tankless Water Heater Error Code 24: How to Fix It | medium | Medium |
| 25 | Rinnai Water Heater Error Code 25: How to Fix It | high | Medium |
| 26 | Rinnai Water Heater Error Code 26: How to Fix It | medium | Medium |
| 29 | Rinnai Water Heater Error Code 29: How to Fix It | high | Hard |
| 31 | Rinnai Water Heater Error Code 31: How to Fix It | medium | Medium |
| 32 | Rinnai Water Heater Error Code 32: How to Fix It | medium | Medium |
| 33 | Rinnai Water Heater Error Code 33: How to Fix It | medium | Medium |
| 34 | Rinnai Tankless Water Heater Error Code 34: How to Fix It | medium | Medium |
| 35 | Rinnai Water Heater Error Code 35: How to Fix It | medium | Medium |
| 36 | Rinnai Water Heater Error Code 36: How to Fix It | medium | Medium |
| 51 | Rinnai Tankless Water Heater Error Code 51: How to Fix It | medium | Medium |
| 52 | Rinnai Tankless Water Heater Error Code 52: How to Fix It | medium | Medium |
| 54 | Rinnai Water Heater Error Code 54: How to Fix It | medium | Medium |
| 55 | Rinnai Tankless Water Heater Error Code 55: How to Fix It | medium | Easy |
| 57 | Rinnai Tankless Water Heater Error Code 57: How to Fix It | medium | Medium |
| 58 | Rinnai Tankless Water Heater Error Code 58: How to Fix It | medium | Medium |
| 59 | Rinnai Tankless Water Heater Error Code 59: How to Fix It | medium | Medium |
| 60 | Rinnai Tankless Water Heater Error Code 60: How to Fix It | medium | Medium |
| 61 | Rinnai Water Heater Error Code 61: How to Fix It | high | Hard |
| 65 | Rinnai Water Heater Error Code 65: How to Fix It | high | Medium |
| 66 | Rinnai Tankless Water Heater Error Code 66: How to Fix It | medium | Medium |
| 70 | Rinnai Water Heater Error Code 70: How to Fix It | critical | Medium |
| 71 | Rinnai Water Heater Error Code 71: How to Fix It | high | Hard |
| 72 | Rinnai Water Heater Error Code 72: How to Fix It | high | Medium |
| 76 | Rinnai Water Heater Error Code 76: How to Fix It | medium | Medium |
| 79 | Rinnai Tankless Water Heater Error Code 79: How to Fix It | medium | Medium |
| 82 | Rinnai Tankless Water Heater Error Code 82: How to Fix It | medium | Easy |
| 85 | Rinnai Water Heater Error Code 85: How to Fix It | medium | Medium |
| 90 | Rinnai Water Heater Error Code 90: How to Fix It | high | Medium |
| 91 | Rinnai Tankless Water Heater Error Code 91: How to Fix It | medium | Medium |
| 92 | Rinnai Water Heater Error Code 92: How to Fix It | medium | Medium |
| LC | Rinnai Water Heater Error Code LC: How to Fix It | high | Medium |