Rinnai Error Code 79: Fan Current Detection
Warning: Your Rinnai water heater is experiencing a fan current issue. It's safe to troubleshoot, but call a professional if you're unsure.
How to Fix Rinnai Code 79
- Check for any visible damage or disconnection in the fan wiring
- Ensure the fan is not clogged with debris or lint
- If safe to do so, try resetting the unit by turning off the power at the breaker, waiting 30 seconds, then turning it back on
How to Reset Rinnai Code 79
- Turn off the unit using the power button on the front panel.
- Turn off the gas supply valve.
- Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
- Restore power at the breaker, then open the gas valve.
- Turn the unit back on. If the error returns, the underlying issue needs repair.
What does 79 mean?
Error code 79 on your Rinnai water heater indicates a problem with the fan current. The fan is crucial for venting combustion gases and maintaining proper operation. This error might be due to a faulty fan, fan motor, or wiring issue. The digital display will show '79' and the unit will lockout, preventing hot water production until the issue is resolved.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Fan Motor | RIN-100142800 | — |
| Control Board | RIN-100142700 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 02 | Stagnant Water Detection | Warning |
| 10 | Air Supply/Exhaust Blockage | Warning |
| 11 | No Ignition | Warning |
| 12 | Flame Failure | Warning |
| 14 | Thermal Fuse | Warning |
| 16 | Over-Temperature | Warning |
| 19 | Electrical Grounding | Warning |
| 25 | Condensate Overflow | Warning |
| 29 | Condensate Neutralizer | Warning |
| 31 | Inlet Thermistor Failure | Warning |