BoilerFaultCodesYour boiler has detected an electrical wiring error where the power wires appear to be connected incorrectly, which is a significant safety risk.
Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now — this fault can be dangerous if ignored.
Technical description: Live on neutral connection Correct fault
What causes this fault?
This fault occurs when the boiler detects that the electrical supply wires are reversed, meaning the 'live' and 'neutral' power lines are connected to the wrong terminals. The most common reason is recent electrical work elsewhere in the property or a failing main control board that can no longer correctly identify the incoming power signal.
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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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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