BoilerFaultCodesYour boiler has stopped working because a sensor that monitors the water temperature has disconnected or broken.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: NTC 1 open
What causes this fault?
This fault occurs when the boiler's control board loses communication with the sensor that monitors the temperature of the water leaving the unit. The most common reason is that the internal sensor has developed an electrical failure or the wiring connecting it to the main board has become loose or damaged. Without this data, the boiler shuts down as a safety precaution to prevents the system from overheating.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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