BoilerFaultCodesYour boiler's computer memory has incorrect settings or corrupted data, causing it to stop running 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: Parameters out of reach: Check the parameter settings.
What causes this fault?
This fault occurs when the boiler's internal memory becomes corrupted or the control board loses its specific configuration settings. It is usually triggered by a power surge, a failing component on the circuit board, or an error during a previous repair where the wrong software parameters were entered. Because the boiler no longer knows its own safety limits, it shuts down completely to prevent damage.
This fault is slightly more common during stormy weather or winter months when power outages and electrical surges are more frequent, which can scramble the sensitive electronic memory.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like 4 3. — no call-out fees, no surprises.
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