BoilerFaultCodesYour boiler has stopped working because its internal temperature sensor that monitors water returning to the unit has developed an electrical fault.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: NTC return sensor short circuit
What causes this fault?
This fault occurs when the sensor responsible for measuring the temperature of the water returning to the boiler develops an electrical short circuit. The most common reason is that the internal components of the sensor have failed due to age or heat stress, though it can also be caused by water leaking onto the electrical connections.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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