BoilerFaultCodesYour boiler has detected an electrical fault with the internal sensor that monitors water temperature, causing the system to shut down 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: Short circuit on flow sensor
What causes this fault?
This fault occurs when the boiler's internal sensor responsible for tracking the temperature of the water leaving the unit fails electrically. It is usually caused by the sensor's internal wiring failing over time or moisture getting into the electrical connections, which prevents the boiler from safely knowing how hot the water is. Because the system can no longer regulate its heat output, it shuts down to prevent overheating.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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