BoilerFaultCodesYour boiler thinks a flame is still burning inside even after it has been told to turn off, which is a safety conflict.
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 detected even though appliance is switched off
What causes this fault?
This fault occurs when the boiler's internal sensors continue to detect a flame signal even after the gas supply has been shut off. The most common reason is a contaminated flame electrode sending a false signal, or a fault within the main control board that is misinterpreting electrical noise as a live 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 F7 — no call-out fees, no surprises.
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