BoilerFaultCodesYour boiler is struggling to safely expel exhaust gases, 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: Fault in flue system
What causes this fault?
This fault occurs when the boiler's internal safety sensors detect that the flue system is obstructed or unable to clear exhaust fumes effectively. The most common reason is a blockage or restriction in the flue pipe itself, or a mechanical failure in the fan that is responsible for pushing gases out of your home.
This fault is more common during periods of high winds, which can cause pressure imbalances in the flue, or during freezing temperatures if ice builds up around the flue terminal.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like 2910 — no call-out fees, no surprises.
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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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