BoilerFaultCodesYour boiler has lost communication with the internal gas control system, meaning it cannot safely release fuel to create a flame.
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 – gas valve not detected.
What causes this fault?
This fault occurs when the boiler's central brain loses its electronic connection with the gas valve, which is the component responsible for letting fuel into the burner. The most common reason is a loose or damaged wiring connection between these two parts, or an internal electronic failure within the gas valve itself.
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.
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A boiler cover plan would cover faults like E.04 – .00 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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