BoilerFaultCodesTechnical description
Internal control box failure (parameters): check parameters and reset.
What causes this fault?
This fault occurs when the boiler's internal computer suffers a communication failure with its memory chip, meaning it can no longer verify its critical safety settings. The most common reason is an electrical glitch or component degradation on the main circuit board that corrupts the saved software parameters. Because the boiler cannot confirm it is operating within safe limits, it automatically shuts down for safety reasons.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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