BoilerFaultCodesYour boiler's computer system has encountered a processing glitch and has stopped working to protect itself.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Software error
What causes this fault?
This fault occurs when the boiler's internal computer brain fails to process data correctly or loses communication with its sensors. The most common reason is an electrical glitch or a component failure on the main circuit board, which causes the system to shut down for safety. In some cases, loose or damaged wiring between the components can also trigger this software conflict.
DIY fix possible
Turn the boiler power switch to the 'Off' position.Wait for approximately 60 seconds.Turn the power back 'On' and press the Reset button if the code persists.
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