Rinnai Error Code 02: Stagnant Water Detection
Warning: Your Rinnai water heater has detected stagnant water, which can lead to bacterial growth. It's safe to use, but needs professional attention.
How to Fix Rinnai Code 02
- Check if your water heater has been unused for a long time. If so, try running a few hot water taps to circulate the water.
- If the issue persists, contact a professional Rinnai technician for further diagnosis and repair.
How to Reset Rinnai Code 02
- 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 02 mean?
The Rinnai 02 error code indicates that the water heater has detected stagnant water in the tank. This can happen when the water isn't being used or cycled for an extended period. While this isn't an immediate safety hazard, stagnant water can lead to bacterial growth and unpleasant odors. It's important to address this issue to maintain the water quality and prevent potential health risks.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Temperature and Pressure Relief Valve (TPR) | RIN-TPR-10 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 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 |
| 32 | Outlet Thermistor Failure | Warning |