BoilerFaultCodesYour boiler's computer has encountered an internal logic 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: Software Error
What causes this fault?
This fault occurs when the boiler's internal control board suffers a critical software crash or memory failure. It typically happens because the electronic components on the circuit board have degraded over time or were damaged by a sudden electrical power surge. Because the 'brain' of the boiler can no longer verify that it is operating safely, it shuts down the system entirely to prevent any danger.
DIY fix possible
Turn the boiler power switch off at the wall or fused spurWait for 30 secondsTurn the power back on and press the reset button
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