BoilerFaultCodesTechnical description
No DHW heating - Cylinder temperature sensor/comfort sensor/loading sensor lead break
What causes this fault?
This fault occurs when the boiler's internal computer loses communication with the sensor that monitors your hot water tank. The most common reason is a physical breakage in the sensor’s wiring or internal electrical failure within the sensor itself, which prevents the boiler from knowing how hot the water is. For safety reasons, the boiler stops heating the water entirely because it can no longer prevent it from overheating.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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