BoilerFaultCodesTechnical description
Flow temperature sensor interruption
What causes this fault?
This fault occurs when the boiler's central control board can no longer detect an electrical signal from the sensor that monitors internal water temperature. The most common reason is that the sensor itself has failed internally, though 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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