Rinnai Error Code 52: Solenoid Valve Failure
Warning: Your Rinnai water heater is locked out due to a solenoid valve issue. It's safe to troubleshoot, but call a pro if needed.
How to Fix Rinnai Code 52
- Step 1: Check the water pressure. It should be between 20-80 PSI. If it's too low, you may need to call a plumber.
- Step 2: Inspect the wiring between the control board and the solenoid valve. Look for any damage or corrosion. If you find any, it's best to call a professional.
- Step 3: If the water pressure is fine and the wiring looks good, it's likely the solenoid valve. Call a Rinnai technician for repair.
How to Reset Rinnai Code 52
- 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 52 mean?
Error code 52 on your Rinnai water heater indicates a problem with the solenoid valve, which controls the flow of water into the tank. This valve is activated by the control board when you call for hot water. When it fails, your water heater won't function, displaying this error code. The most common cause is a faulty solenoid valve itself, but other issues like low water pressure or control board problems can also trigger this code.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Solenoid Valve | RIN-1000000000 | — |
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 |