BoilerFaultCodesTechnical description
Electrical problem in the water pressure sensor
What causes this fault?
This fault occurs when the boiler's internal computer loses communication with the water pressure sensor, often due to an electrical short or a component failure inside the sensor itself. Without a reliable reading, the boiler cannot confirm there is enough water to operate safely and will shut down to prevent internal damage. The most common reason is general wear and tear of the sensor's electronics, though a loose connection in the wiring can also trigger the error.
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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