Technical description
Parameter anomaly
What causes this fault?
This fault occurs when the boiler's internal computer data becomes corrupted or the various electronic boards stop talking to each other correctly. The most common reason is a power surge or a physical failure of the memory chip on the main circuit board, which prevents the boiler from knowing its own operating instructions.
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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