BoilerFaultCodesTechnical description
Opening air/gas ratio control valve/oil solenoid valves
What causes this fault?
This fault occurs when the boiler's internal computer is unable to communicate with or control the valve that regulates the flow of gas into the burner. It signifies a hardware failure where the gas valve remains closed or unresponsive, preventing the boiler from creating a flame to provide heating or hot water. The most common reasons include a faulty electronic control board, a loose wiring connection, or a mechanical failure within the gas valve itself.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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