BoilerFaultCodesYour boiler is experiencing a communication problem with its internal temperature sensor, causing it to shut down unexpectedly from time to time.
This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.
Technical description: Intermittent lock-out
What causes this fault?
This fault occurs when the boiler's main control board loses its connection with the temperature sensor that monitors the heat exchanger. The most common reason is that the sensor has developed an internal electrical failure or the wiring connecting it to the circuit board has become loose or corroded over time.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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