Your boiler's internal sensor that monitors water pressure has lost electrical contact or has failed, causing the system to stop working for safety.

Fault:Waterpress.sensor Interruption/shortcircuitofwaterpressuresensor,interruption/short circuittoGNDinsupplylinetowaterpressuresensororwaterpressure sensordefective

What causes this fault?

This fault occurs when the boiler's control board loses the electronic signal from the sensor that monitors internal water pressure. The most common reason is that the sensor itself has developed an internal electrical fault or the wiring connecting it to the main computer has become loose or damaged. Without this data, the boiler shuts down to prevent itself from firing while potentially dry.