Can I reset my Weil-McLain boiler to clear the Flame Loss 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 Loss 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 Weil-McLain Flame Loss 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.

Weil-McLain Error Code

Weil-McLain Error Code Flame Loss

Flame signal lost during firing.

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Licensed & Insured Gas-Certified Technicians Serving Vancouver Since 1999

If your Weil-McLain combi boiler is showing error code Flame Loss, here's what it means: Flame signal lost during firing. 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.

Weil-McLain boilers report faults using descriptive control faults. Knowing the code helps a technician arrive prepared with the right parts, which usually means a faster, lower-cost repair.

What causes the Flame Loss code?

Error Flame Loss on a Weil-McLain boiler is most commonly caused by one of the following:

Gas pressure
Flame sensor
Venting

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 Loss 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 Weil-McLain 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 Weil-McLain codes & help

Weil-McLain Ignition LockoutFailed to detect a flame after ignition attempts.Weil-McLain High Limit LockoutOver-temperature high-limit tripped.Weil-McLain Supply Temp SensorSupply sensor open or shorted.Weil-McLain Return Temp SensorReturn sensor open or shorted.Weil-McLain Flue Temp SensorFlue sensor fault or flue over-temp.All Weil-McLain Error CodesFull list

Fix Your Weil-McLain Flame Loss Fault

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