Rinnai Error Code 19: Electrical grounding / DC circuit short (Tankless)
Rinnai error code 19 on a tankless water heater means: Electrical grounding / DC circuit short. It is also called Rinnai diagnostic code 19.
Homeowner? What Rinnai code 19 means for you
Call a technician Your tankless water heater is reporting: Electrical grounding / DC circuit short. The tankless water heater has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
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 19 mean?
Code 19 showing right after water flow starts (no visible flame) indicates an electrical short in a component on the DC circuit.
Applies to: SENSEI Series; SENSEI RX/CX Series; Non-SENSEI Series
Common causes of Rinnai code 19
- Shorted wiring harness
- Shorted water flow control valve
- Shorted bypass valve
A technician checks these and 1 other possible causes on site before replacing any part.
Rinnai models that use code 19
Show all 89 models
C199eC199iCU160eCU160iCU199eCU199iCX160iCX199iCXP160iCXP199iR50LSiR63LSe2R75LSeR75LSiR94LSeR94LSiR98LSeR98LSe-ASMER98LSiR98LSi-ASMERC80eRC80iRC98eRC98iRE140eRE140iRE160eRE160iRE180eRE180iRE199eRE199iREP160eREP160iREP199eREP199iRH180RL75eRL75e(A)RL75iRL75i(A)RL94eRL94iRLX94iRSC160eRSC160iRSC199eRSC199iRU80eRU80iRU90eRU98eRU98iRU130eRU130iRU160eRU160iRU180eRU180iRU199eRU199iRUC80iRUC90iRUC98iRUCS65iRUCS75iRUR98eRUR98iRUR160eRUR160iRUR199eRUR199iRUS65eRUS75eRX130iRX160iRX180iRX199iRXP160iRXP199iV53DeV53eV65eV65iV75eV75iV94eV94iV94Xi
Other Rinnai Tankless codes
All Rinnai Tankless Water Heater error codes →
Rinnai code 19: homeowner questions
What does Rinnai code 19 mean?
Electrical grounding / DC circuit short. Code 19 showing right after water flow starts (no visible flame) indicates an electrical short in a component on the DC circuit.
Is it safe to keep using my tankless water heater with code 19?
It depends on the cause. The tankless water heater has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
Can I reset Rinnai code 19 myself?
You can try one reset (power off for 30 seconds, then on). If Rinnai code 19 comes back, the cause is still there and a licensed technician should check it.
Who can fix Rinnai code 19 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.31. 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.