BoilerFaultCodesTechnical description
Flow temperature sensor
What causes this fault?
This fault occurs when the boiler's main control board loses communication with the sensor that monitors the temperature of the water heading to your radiators. The most common reason is that the internal sensor has developed a physical defect or the electrical wiring connecting it to the brain of the boiler 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.
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