Rinnai Error Code 520: Gas solenoid valve circuit – flame after valve close (Combi Boiler)
Rinnai error code 520 on a combi boiler means: Gas solenoid valve circuit – flame after valve close. It is also called Rinnai diagnostic code 520.
Homeowner? What Rinnai code 520 means for you
Stop and call Your combi boiler is reporting: Gas solenoid valve circuit – flame after valve close. 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 520 mean?
The flame rod still senses flame after the board has commanded the gas valve to close.
Applies to: I-Series Plus boilers — 150K BTU and smaller and 175K BTU and higher (Combi and Solo)
Common causes of Rinnai code 520
- Loose or damaged gas solenoid valve wiring
- Gas solenoid out of resistance/voltage spec
- Wet flame rod from a leaking heat exchanger
A technician checks these and 2 other possible causes on site before replacing any part.
Rinnai models that use code 520
IP060160CIP090099CIP090160CIP090199CIP120199CIP150199CIP175199CIP199199C
Other Rinnai Combi Boiler codes
All Rinnai Combi Boiler error codes →
Rinnai code 520: homeowner questions
What does Rinnai code 520 mean?
Gas solenoid valve circuit – flame after valve close. The flame rod still senses flame after the board has commanded the gas valve to close.
Is it safe to keep using my combi boiler with code 520?
No. Code 520 is a safety shutdown, so keep the combi boiler off until a licensed technician has checked it.
Can I reset Rinnai code 520 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 520 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.30. 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.