BoilerFaultCodesTechnical description
Flame detected after gas has been shut off
What causes this fault?
This fault occurs when the boiler's internal sensors continue to detect heat or a flame after the heating cycle has finished and the gas should be off. The most common reason is that the gas valve has become stuck open or 'leaky,' or the sensing electrode is sending a false signal back to the main control board. Because the system cannot confirm the fire is actually out, it enters a high-security shutdown to prevent overheating.
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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