BoilerFaultCodesTechnical description
Temperature sensors faulty (DHW and CH sensors).
What causes this fault?
This fault occurs when the boiler's internal sensors, which monitor the heat of your water, begin sending incorrect or or 'out-of-range' electrical signals to the main control board. The most common reason is that the sensors have physically degraded over time or developed a scale buildup, meaning they can no longer accurately measure temperature to keep the system running safely.
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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