BoilerFaultCodesTechnical description
If the red fault indication light is illuminated, it indicates a fault or overheat condition requiring a reset procedure.
What causes this fault?
This fault occurs when the boiler's internal safety sensors detect that the water temperature has exceeded safe limits or if a component has failed. The most common reasons include a blockage in the system, a pump failure that prevents water from moving, or a build-up of limescale within the heat exchanger. Because the unit cannot safely cool itself down, it shuts off to prevent damage to the internal parts.
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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