BoilerFaultCodesYour boiler is still detecting a flame even though it has tried to turn the gas off, which is a safety conflict that requires a professional inspection.
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 after gas shut off
What causes this fault?
This fault occurs when the boiler's internal sensor continues to detect a flame even after the system has commanded the gas supply to stop. The most common reasons are a gas valve failing to close properly, a sensor that is wrongly reporting a ‘ghost’ flame due to carbon buildup, or a faulty control board misinterpreting electrical signals.
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.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like FA — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Worcester Bosch 29 HE Conventional is discontinued — time for a new one?
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.
Affiliate links — we may earn a commission at no extra cost to you.