Your boiler has stopped working because it cannot accurately tell if there is enough water pressure in the system to operate safely.

Low Pressure Sensor Error

What causes this fault?

This fault occurs when the boiler's internal computer loses communication with the sensor that monitors water levels. The most common reason is an electrical failure within the sensor itself or a loose connection in the wiring, meaning the boiler shuts down as a safety precaution because it cannot verify if it is safe to fire up.