BoilerFaultCodesYour boiler has detected a safety issue with the gas control system and has shut down to prevent any hazards.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Gas valve error
What causes this fault?
This fault occurs when the boiler's control board detects an electrical mismatch or a physical failure within the gas valve assembly. It typically happens because the valve can no longer open or close safely, or the ignition electrode is failing to confirm that a flame has been lit. To ensure your safety, the system automatically shuts down to prevent gas from flowing incorrectly.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E30 — no call-out fees, no surprises.
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