BoilerFaultCodesTechnical description
User interface or distant control panel fault
What causes this fault?
This fault occurs when the main computer inside the boiler loses its physical connection to the display panel or the external controller. It is usually caused by a loose wiring connection or a component failure on one of the circuit boards, meaning your instructions can no longer reach the boiler’s ignition system. Think of it like a broken telephone line between your thermostat and the boiler's engine.
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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