BoilerFaultCodesYour boiler has detected an internal electrical or computer error and has stopped working 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: Other Errors
What causes this fault?
This fault occurs when the boiler's central control unit suffers a critical communication failure or an internal electrical short. It usually means the main circuit board can no longer safely monitor the boiler's components, so it shuts down the system instantly to prevent damage. The most common reason is age-related wear on the control board's solder points or a surge in the electrical supply.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
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