High Lockout
1065 on Worcester Bosch Greenstar 8000 Life/Style

Your boiler has detected an issue with the sensor that monitors internal water pressure, meaning it cannot confirm if there is enough water to operate safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

System pressure sensor

What causes this fault?

This fault occurs when the boiler's internal computer loses communication with the sensor that tracks water pressure. It is usually caused by a physical failure of the sensor's internal diaphragm or a loose electrical connection in the wiring harness. Because the boiler cannot verify if there is enough water to operate safely without damaging the heat exchanger, it will shut down as a precaution.

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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Related fault codes

1068View →

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