BoilerFaultCodesTechnical description
Flow sensor constant value fault
What causes this fault?
This fault occurs when the boiler's control chip detects that the temperature sensor is stuck on a single reading even though the burner is firing. The most common reason is that the sensor has developed an internal electrical failure or have become coated in debris, preventing it from registering price temperature changes. In some cases, it can also be caused by a loose connection or damaged wiring between the sensor and the main circuit board.
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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