BoilerFaultCodesTechnical description
Flow temperature sensor error
What causes this fault?
This fault occurs when the boiler's control system receives an incorrect or missing electrical signal from the flow temperature sensor. The most common reason is that the sensor itself has internal electrical failure, or the wiring connecting it to the main control board has become loose or damaged.
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.
Find a Gas Safe engineer
Search the official register →