Noritz · Water heater
Code 67 Air-gas mixer (AGM) abnormality
What this code means
The component that blends air and gas for combustion isn't operating within expected range.
Most likely causes
- Failing AGM component
- Wiring or connector fault
What to try first
Not user-serviceable; requires a licensed technician.
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 Noritz error code Code 67 mean?
Air-gas mixer (AGM) abnormality. The component that blends air and gas for combustion isn't operating within expected range.
Can I fix Noritz code Code 67 myself?
Usually not. Not user-serviceable; requires a licensed technician. If the code returns after one reset, it needs a licensed technician.
What causes Noritz code Code 67?
The most common causes are: failing agm component; wiring or connector fault.
Other Noritz water heater codes
All Noritz water heater error codes →
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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.