BoilerFaultCodesYour boiler's temperature sensor for hot water has stopped working correctly, meaning your taps and showers may not get warm or could stay cold.
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: Hot water thermistor (NTC) fault
What causes this fault?
This fault occurs when the internal sensor responsible for monitoring your tap water temperature fails or sends an incorrect signal to the boiler's control board. The most common reason is that the sensor has physically degraded over time or developed a lime-scale coating, preventing it from reading the water temperature accurately. In some cases, the error is caused by loose or corroded electrical connections between the sensor and the main wiring.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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