BoilerFaultCodesYour boiler has stopped working because it has detected an electrical fault with the internal sensor that monitors the temperature of the water leaving the unit.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flow temperature sensor short-circuit
What causes this fault?
This fault occurs when the electrical signal from the sensor that monitors the outgoing water temperature is interrupted, usually due to a physical failure inside the component. The most common reason is that moisture or heat stress over time has damaged the sensor's internal wiring, causing it to send an incorrect 'short-circuit' signal to the main control board. If the sensor cannot safely report the temperature, the boiler will shut down as a safety precaution.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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