BoilerFaultCodesYour boiler has detected an electrical fault connected to the component that controls the gas flow, meaning it cannot safely light the burner.
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 + defective | Short circuit/earth (ground) leak in cable loom to gas valves, gas valve assembly defective (earth/ground leak from coils), electronic control system defective
What causes this fault?
This fault occurs when the boiler's main control board loses the ability to safely manage the fuel supply because of an electrical malfunction. The most common reason is an internal short circuit in the gas valve's coils or damage to the wiring, which prevents the system from opening the valve to ignite the burner.
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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