Rinnai Error Code SS: Service Soon alert (also listed as 55) (Tankless)
Rinnai error code SS on a tankless water heater means: Service Soon alert (also listed as 55). It is also called Rinnai diagnostic code SS.
Homeowner? What Rinnai code SS means for you
Usually minor Your tankless water heater is reporting: Service Soon alert (also listed as 55). This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.
Safe things you can check yourself
- Check that gas reaches the house: other gas appliances work, or the propane tank is not empty.
- Make sure the heater is plugged in and its breaker is on. In winter, keep the power on: it protects the unit from freezing.
- Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
- Check that the hot and cold water valves under the heater are fully open.
- If you have a remote controller, turn it off and on once. If the code comes back, call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Rinnai error code SS mean?
Time-based service reminder configured at installation (Parameter 03). It means the unit is due for service and the heat exchanger should be flushed.
Applies to: SENSEI Series, SENSEI RX/CX Series
Common causes of Rinnai code SS
- Service interval set in Parameter 03 has elapsed
- Heat exchanger due for flushing (scale risk with hard water)
Rinnai models that use code SS
Show all 30 models
CU160eCU160iCU199eCU199iCX160iCX199iCXP160iCXP199iRSC160eRSC160iRSC199eRSC199iRU130eRU130iRU160eRU160iRU180eRU180iRU199eRU199iRUR160eRUR160iRUR199eRUR199iRX130iRX160iRX180iRX199iRXP160iRXP199i
Other Rinnai Tankless codes
All Rinnai Tankless Water Heater error codes →
Rinnai code SS: homeowner questions
What does Rinnai code SS mean?
Service Soon alert (also listed as 55). Time-based service reminder configured at installation (Parameter 03). It means the unit is due for service and the heat exchanger should be flushed.
Is it safe to keep using my tankless water heater with code SS?
Usually yes. Code SS is normally minor, but if it keeps coming back have it checked.
Can I reset Rinnai code SS myself?
You can try one reset (power off for 30 seconds, then on). If Rinnai code SS comes back, the cause is still there and a licensed technician should check it.
Who can fix Rinnai code SS near me?
Aurora Star Tech Inc. repairs Rinnai tankless water heaters in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: Tankless Water Heater No Hot Water: What to Check
Troubleshooting guides
- No hot water All brands · Tankless Water Heater
- Water temperature fluctuates All brands · Tankless Water Heater
Source: Rinnai Troubleshooting TWH Diagnostic Codes (100000652), p.66. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.