Can I reset my Laars boiler to clear the Flame Failure 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 Flame Failure 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 Laars Flame Failure 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.

Laars Error Code

Laars Error Code Flame Failure

The flame was lost during a heating or hot-water call.

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Licensed & Insured Gas-Certified Technicians Serving Vancouver Since 1999

If your Laars combi boiler is showing error code Flame Failure, here's what it means: The flame was lost during a heating or hot-water call. 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.

Laars boilers report faults using fault codes and lockout messages on the mascot ft / ft fire-tube display. Knowing the code helps a technician arrive prepared with the right parts, which usually means a faster, lower-cost repair.

What causes the Flame Failure code?

Error Flame Failure on a Laars boiler is most commonly caused by one of the following:

Gas pressure fluctuation
Dirty flame sensor
Condensate or venting restriction

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 Flame Failure 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 Laars 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 Laars codes & help

Laars Ignition LockoutNo flame was detected after the ignition sequence, so the…Laars High Limit LockoutThe boiler overheated past its safe limit.Laars Low Water PressureSystem pressure is too low to operate safely.Laars Supply Sensor FaultThe outlet water temperature sensor is open or shorted.Laars Return Sensor FaultThe inlet water temperature sensor is open or shorted.All Laars Error CodesFull list

Fix Your Laars Flame Failure Fault

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