BoilerFaultCodesYour boiler has detected that the electrical wiring coming into the unit is connected backwards, which is preventing it from starting up for safety reasons.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: PHASE REVERSAL ERROR (Check wiring to the boiler for reversed live and neutral)
What causes this fault?
This fault occurs when the electrical supply to the boiler has been wired incorrectly, causing the live and neutral connections to be swapped. It most commonly happens after electrical work has been carried out in the home or if a new power cable has been fitted to the boiler. For safety, the boiler will refuse to ignite because it cannot correctly verify that the electrical circuit is safe to operate.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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