Your boiler is having trouble communicating with its control screen or your thermostat, which is preventing it from receiving your heating instructions.

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.