BoilerFaultCodesTechnical description
Burner does not start. Flow sensor fault (short circuit or lead break).
What causes this fault?
This fault occurs when the boiler's internal computer loses communication with the sensor that monitors the heat of the water leaving the unit. It is usually caused by the sensor's internal electronics failing or the connecting wires becoming damaged or loose. Without this data, the boiler shuts down as a safety precaution to prevent the system from dangerously overheating.
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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