BoilerFaultCodesYour boiler has detected an electrical communication problem with the internal gas valve, which is preventing it from safely lighting the flame for heating and hot water.
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 control circuit error
What causes this fault?
This fault occurs when the boiler's main control board loses its electrical connection with the gas valve, meaning the system can no longer control the flow of fuel. The most common reason is an internal electronic failure within the valve's circuitry or a loose connection in the wiring harness that links the components together. In some cases, the control board itself may have degraded and is failing to send the correct signals to initiate ignition.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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