Rinnai Error Code 19: Electrical Grounding
Warning: Your Rinnai water heater is experiencing an electrical grounding issue, which could lead to system damage if not addressed.
How to Fix Rinnai Code 19
- First, check if the ground wire connected to your water heater is securely fastened and not damaged.
- Next, ensure that the grounding electrode (usually a rod or a copper wire connected to a cold water pipe) is properly installed and not damaged.
- If you're not comfortable performing these checks, or if the problem persists, contact a licensed HVAC technician immediately.
How to Reset Rinnai Code 19
- 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 19 mean?
Rinnai error code 19 indicates a problem with the electrical grounding of your water heater. This could be due to a faulty ground wire, a poor connection, or a problem with the grounding electrode. The system has detected a voltage reading that's outside of its normal range, causing it to shut down to prevent potential damage.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Ground Wire | — | — |
| Grounding Electrode | — | — |
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 |
| 25 | Condensate Overflow | Warning |
| 29 | Condensate Neutralizer | Warning |
| 31 | Inlet Thermistor Failure | Warning |
| 32 | Outlet Thermistor Failure | Warning |