Emergency Lockout
4.4 on Ideal Logic Max System

Your boiler has detected a flame when it shouldn't be there, which usually means a internal component is stuck open or there is a fault with the electronics.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description

Flame On Before Gas Valve On

What causes this fault?

This fault occurs when the boiler’s safety sensors detect a flame inside the burner before the gas valve has actually been told to open. The most common reason is a gas valve that is physically stuck open or leaking, though it can also be caused by a fault in the control board’s electronics that incorrectly senses electricity where there shouldn't be any.

Engineer required

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

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