Can I reset my NTI boiler to clear the Ignition Lockout code?

You can reset once if your manual says it's safe. If the code returns, stop resetting — repeated resets on a genuine fault, especially gas or overheat faults, can be unsafe and may worsen the problem. Book a licensed repair instead.

Is the Ignition Lockout fault dangerous?

Treat it as urgent. This code involves systems where continued operation can be unsafe. Turn the boiler off if it keeps recurring and call for a licensed repair; if you smell gas, leave and call your gas utility's emergency line.

How much does it cost to fix a NTI Ignition Lockout fault?

Cost depends on the underlying cause — some causes (like low pressure or a dirty sensor) are minor, while others (like a gas valve or control board) cost more. We diagnose first and give you a clear price before any repair.

NTI Error Code

NTI Error Code Ignition Lockout

The boiler attempted to light but no flame was proven after several tries, so it locked out for safety.

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Licensed & Insured Gas-Certified Technicians Serving Vancouver Since 1999

If your NTI combi boiler is showing error code Ignition Lockout, here's what it means: The boiler attempted to light but no flame was proven after several tries, so it locked out for safety. This is an urgent fault. Stop using the boiler if it keeps recurring and book a licensed repair promptly — especially if it involves gas, ignition, overheating or the flue.

NTI boilers report faults using fault lockouts and sensor messages on the trinity tft / tx display. Knowing the code helps a technician arrive prepared with the right parts, which usually means a faster, lower-cost repair.

What causes the Ignition Lockout code?

Error Ignition Lockout on a NTI boiler is most commonly caused by one of the following:

No or low gas supply
Faulty igniter or spark electrode
Gas valve fault
Air in the gas line after recent service

What you can safely check first

Note the exact code and your boiler's model number
Check the pressure gauge — low pressure triggers many faults
Confirm the gas supply is on and other gas appliances work
Reset the boiler once, per the manual, only if it's safe to do so
If the code returns, stop and call a licensed technician

Why this needs a licensed technician

Resolving a Ignition Lockout fault almost always involves the gas, combustion, sensor or pressurized side of the appliance. Under BC's Safety Standards Act, that work must be performed by a licensed gas fitter — and doing it correctly protects your warranty and your safety. We diagnose NTI boilers, carry common parts, and verify clean combustion before returning your boiler to service.

Smell gas or suspect carbon monoxide? Leave now.

If you smell gas, hear hissing, or your CO alarm sounds, leave the building immediately and call your gas utility's emergency line from outside. Do not operate switches or relight the appliance. Once you are safe, call us for a licensed repair.

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Frequently Asked Questions

Other NTI codes & help

NTI Flame LossThe burner lit but the flame was lost during operation.NTI High Limit LockoutWater temperature exceeded the safe high-limit, so the bo…NTI Low Water PressureSystem pressure dropped below the minimum needed to run s…NTI Outlet Sensor FaultThe supply (outlet) temperature sensor reads open or shor…NTI Inlet Sensor FaultThe return (inlet) temperature sensor reads open or short…All NTI Error CodesFull list

Fix Your NTI Ignition Lockout Fault

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