BoilerFaultCodesYour boiler has stopped working because of an internal communication error with its main brain, often caused by a failing circuit board.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Internal fault
What causes this fault?
This fault occurs when the boiler's internal computer chips stop talking to each other correctly. It is usually caused by electrical components on the main control board wearing out or becoming unstable due to age. In some cases, loose or damaged wiring between the internal sensors and the brain of the boiler can also trigger this specific error.
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.
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