BoilerFaultCodesTechnical description
Controls without flow temperature sensor (low loss header): System flow temperature sensor shorted out
What causes this fault?
This fault occurs when the electrical signal from the temperature sensor is interrupted or fails to send back the correct information. The most common reason is a physical failure of the internal sensor components or damage to the wiring that connects the sensor to the boiler's main control board. If the boiler cannot accurately measure how hot the water is, it shuts down to prevent the system from 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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