BoilerFaultCodesYour boiler is struggling to stay lit when it is running at its lowest power level, often causing it 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: No flame signal with low output
What causes this fault?
This fault occurs when the boiler's internal sensor can no longer detect a steady flame while the unit is operating at its quietest, most efficient setting. The most common reason is that the sensing probe has become dirty or worn out, though it can also be caused by the gas valve failing to deliver a consistent flow of fuel at low pressures.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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