BoilerFaultCodesYour boiler has detected an issue with the sensor that monitors the temperature of the water heading to your radiators, causing the system to stop working for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Heating flow sensor fault
What causes this fault?
This fault occurs when the internal sensor responsible for measuring the temperature of the water leaving the boiler fails or sends an incorrect signal. The most common reason is that the sensor has developed an electrical fault or has become corroded over time, though it can also be triggered by loose or damaged wiring connecting the sensor to the main control board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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