BoilerFaultCodesYour boiler's electronic control board is receiving a confusing signal regarding the flame, which has caused the system to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Value sent back by ASIC is incorrect (flame slgnal)
What causes this fault?
This fault occurs when the boiler's internal computer receives conflicting information about whether a flame is actually present inside the unit. It is usually caused by an electronic glitch on the main circuit board or a faulty sensor that is incorrectly detecting heat when it shouldn't. Because the system cannot be certain if it is safe to fire up, it shuts down to prevent potential damage or gas issues.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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