Noritz Boiler Error Codes
A plain-English reference to 17 common Noritz fault codes — what each means, what causes it, and when to call a licensed BC gas technician.
Noritz condensing units show a numeric fault code on the controller or remote. Built on Noritz's tankless heritage, they are efficient but sensitive to venting and condensate conditions. This reference covers the common Noritz fault codes, their causes, and why ignition, gas and venting faults are work for a licensed BC gas technician.
Smell gas? Leave the building immediately and call 911 or FortisBC at 1-800-663-9911 from outside. Never bypass a safety lockout or attempt gas work yourself — in BC it must be done by a licensed gas fitter.
Air-pressure / venting fault
Ignition fault
Flame failure
Over-temperature / high-limit
Gas-supply / gas-valve fault
Combustion-fan fault
Water-flow / circulation fault
Control-board (PCB) fault
Communication fault
Noritz error codes — FAQ
Why is my Noritz boiler showing an error code?
Noritz boilers display a fault code when a safety circuit detects a problem — for example with ignition, flame, water flow, temperature or venting. The code points to the affected system. The boiler shuts down to protect itself; a licensed technician then diagnoses the true root cause before repair.
Can I just reset my Noritz boiler?
A single reset after a one-off event is usually fine, but repeated resets without fixing the cause can be unsafe — especially for ignition, gas and venting faults — and can cause further damage. If the code returns, switch the boiler off and call GasBoilers.ca at 604-359-1081.
Do you repair all Noritz boiler models in Greater Vancouver?
Yes. Our Red Seal–certified, gas-licensed technicians service Noritz NCC combi and condensing series across Vancouver, Burnaby, Surrey, Richmond, the Tri-Cities and the rest of Greater Vancouver. Same-day appointments are often available.
Error codes by brand
Get your Noritz boiler back up and running
Licensed, Red Seal–certified gas technicians across Greater Vancouver. Upfront pricing, same-day service available.