BoilerFaultCodesYour boiler’s internal computer settings have become scrambled or are incorrect, preventing it from running safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Parameters out of range
What causes this fault?
This fault occurs when the boiler's internal memory loses its configuration or the electronic components fail to communicate the correct operational limits. It is typically caused by a power surge, an aging circuit board, or internal electrical interference that corrupts the settings required for the boiler to fire safely. The boiler essentially forgets how to run correctly and shuts down as a safety precaution.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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