BoilerFaultCodesYour boiler has detected that a temperature sensor is giving readings outside of its normal bounds, causing the system to shut down as a precaution.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Sensor temperature limitations
What causes this fault?
This fault occurs when the main control board receives a signal from a temperature sensor that is far beyond the expected range, suggesting the component has failed or its connection is broken. It is usually caused by an internal short-circuit in the sensor or a loose wire in the harness that prevents the boiler from accurately monitoring heat levels. As a safety measure, the system stops firing to prevent potential overheating or damage to the heat exchanger.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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