Rinnai Error Code 161: High DHW outgoing water temperature (Combi Boiler)
Rinnai error code 161 on a combi boiler means: High DHW outgoing water temperature. It is also called Rinnai diagnostic code 161.
Homeowner? What Rinnai code 161 means for you
Stop and call Your combi boiler is reporting: High DHW outgoing water temperature. This code is a safety shutdown. Turn the combi boiler off and call a licensed technician. Do not keep resetting it. If you smell gas, leave the house and call your gas utility or 911 from outside.
Safe things you can check yourself
- Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
- Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Rinnai error code 161 mean?
Triggered when the system sees domestic hot water above 203°F (95°C).
Applies to: I-Series Plus boilers — 150K BTU and smaller and 175K BTU and higher (Combi)
Common causes of Rinnai code 161
- Damaged DHW outlet sensor wiring
- Scaled or faulty DHW outlet thermistor
- Wrong gas type supplied or wrong A0 setting
A technician checks these and 2 other possible causes on site before replacing any part.
Rinnai models that use code 161
IP060160CIP090099CIP090160CIP090199CIP120199CIP150199CIP175199CIP199199C
Other Rinnai Combi Boiler codes
All Rinnai Combi Boiler error codes →
Rinnai code 161: homeowner questions
What does Rinnai code 161 mean?
High DHW outgoing water temperature. Triggered when the system sees domestic hot water above 203°F (95°C).
Is it safe to keep using my combi boiler with code 161?
No. Code 161 is a safety shutdown, so keep the combi boiler off until a licensed technician has checked it.
Can I reset Rinnai code 161 myself?
Do not keep resetting it. Repeated resets can hide a safety problem; a licensed technician needs to find the cause.
Who can fix Rinnai code 161 near me?
Aurora Star Tech Inc. repairs Rinnai combi boilers 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 · Boiler Not Heating: What to Check
Source: Rinnai Troubleshooting I-Series Plus Boiler Diagnostic Codes (800000375), p.11. 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.