Rinnai Error Code 17: Rinnai Code 17 - Exhaust or Intake Blockage
Warning: Your Rinnai tankless water heater has shut down due to a potential exhaust or intake blockage. This requires troubleshooting to restore hot water.
How to Fix Rinnai Code 17
- Step 1: Visually inspect the exterior exhaust and intake vents for any obvious obstructions like leaves, snow, or ice. Clear away any debris you can safely reach.
- Step 2: Ensure that the vent termination is not damaged or crushed. If it is, contact a qualified technician.
- Step 3: If the error persists after clearing any visible obstructions, call a qualified HVAC technician to inspect the unit and venting system internally.
How to Reset Rinnai Code 17
- 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 17 mean?
Rinnai error code 17 indicates a problem with the venting system. Specifically, the unit's sensors have detected an obstruction in either the exhaust vent (where combustion gases leave the unit) or the intake vent (where fresh air enters for combustion). This is important because proper venting is needed for safe and efficient operation. If exhaust gases can't escape, they could potentially back up into your home. Also, the unit needs the correct air-to-fuel ratio to burn cleanly.
When the control board detects a blockage, it shuts down the unit as a safety precaution. The unit will not operate until the blockage is cleared and the error code is reset. This protects you from potentially dangerous conditions and prevents damage to the unit.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Fan Motor | 256000031 | — |
| Pressure Sensor | — | — |
| Vent Termination | — | — |
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 |