Your boiler is struggling to monitor the temperature of your hot water, which usually means it won't be able to provide consistent hot water to your taps.

Fault on Hot Water Sensor

What causes this fault?

This fault occurs when the internal sensor responsible for measuring the temperature of your tap water fails or sends an unreadable signal back to the main control board. The most common reason is that the sensor has physically degraded over time or developed an electrical short due to constant heat cycles. In some cases, it can also be triggered by a loose connection or damaged wiring between the sensor and the boiler’s computer.