BoilerFaultCodesYour boiler has detected an issue with the internal seals or gas components, which usually means it has locked itself out for safety reasons.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: ‘O’Rings/Seals Kit - Gas Components
What causes this fault?
This fault occurs when the boiler detects a potential leak or failure within the internal gas delivery system or the airtight seals around the burner. The most common reason is that the rubber 'O' rings or gaskets have degraded over time due to high operating temperatures, preventing the unit from maintaining a safe internal environment. Depending on the exact sensor reading, it may also indicate that the gas valve itself is failing to regulate the flow correctly.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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