Technical description
ignition
What causes this fault?
This fault occurs when the boiler successfully creates a spark and ignites the gas, but the flame goes out almost immediately or isn't recognized by the system. The most common reasons are a worn-out sensing probe that can no longer 'see' the flame, or a gas valve that isn't delivering enough fuel to maintain a steady burn.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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