BoilerFaultCodesTechnical description
High Pressure Sensor Error
What causes this fault?
This fault occurs when the system's internal pressure exceeds safe operating limits, often due to the expansion vessel failing or being incorrectly charged. It can also be triggered by a faulty sensor sending incorrect readings to the control board or by someone accidentally overfilling the system via the filling loop.
This issue often surfaces when the heating is first turned on after summer, as the expansion vessel is put under maximum stress when the water transitions from cold to hot.
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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