Takagi · Water heater
Code 111 Ignition failure
What this code means
Takagi's ignition fault code, same underlying cause family as Rinnai code 11.
Most likely causes
- Gas supply issue
- Igniter or flame sensor fault
What to try first
Confirm the gas shutoff valve is fully open.
Safety note: if this code returns after one clean reset, stop resetting it — repeated lockouts usually mean a real fault that needs a licensed technician. Never bypass a safety switch.
FAQ
What does Takagi error code Code 111 mean?
Ignition failure. Takagi's ignition fault code, same underlying cause family as Rinnai code 11.
Can I fix Takagi code Code 111 myself?
Usually not. Confirm the gas shutoff valve is fully open. If the code returns after one reset, it needs a licensed technician.
What causes Takagi code Code 111?
The most common causes are: gas supply issue; igniter or flame sensor fault.
Other water heater brands: Rheem · Ruud · Rinnai · Navien · Noritz · A.O. Smith · Bradford White · State / American · Generic electric · Generic tankless
This information may contain errors or not apply to your exact model — always double-check it against your appliance's own manual before acting. If there's any chance of a gas, fire, electrical, carbon monoxide, or other safety hazard, stop and call a licensed professional or the appropriate agency (e.g. your gas utility) instead of relying on this page alone.