BoilerFaultCodesYour boiler's main control board has lost contact with the digital display or internal computer, meaning it can no longer send or receive instructions.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Communication failure
What causes this fault?
This fault occurs when the 'brain' of the boiler and the control panel stop speaking to each other, often due to a loose internal connection or a component failure. It is usually caused by a surge in the electrical supply or moisture affecting the sensitive circuitry inside the casing. Because the two parts cannot sync, the boiler shuts down as a safety precaution because it can no longer monitor its own sensors.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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