BoilerFaultCodesYour boiler thinks a flame is present when it shouldn't be, causing the system to shut down for safety purposes.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Lockout Burner Mains - Automatic False Flame Fault
What causes this fault?
This fault occurs when the boiler's control system detects an electrical signal from the burner even though it hasn't commanded the gas to ignite yet. The most common reasons are a contaminated flame sensor sending a rogue signal, a gas valve that is leaking slightly, or a fault within the main circuit board that is misinterpreting electrical noise as a flame.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like False Flame Fault — no call-out fees, no surprises.
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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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