BoilerFaultCodesYour boiler's internal computer has developed a serious communication fault and can no longer control the heating process safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Control box failure
What causes this fault?
This fault occurs when the boiler's internal computer brain suffers a critical hardware failure or loses the ability to talk to its sensors. The most common reason is electrical degradation of the circuit board components over time, preventing the system from performing its safety checks.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 14 — no call-out fees, no surprises.
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