BoilerFaultCodesTechnical description
Poor/No circulation
What causes this fault?
This fault occurs when the boiler detects that there is either not enough water in the system or the water is not moving through the pipes as it should. The most common reason is a drop in water pressure due to a minor leak, but it can also happen if the internal pump has seized or becomes blocked with debris.
This issue often appears when you turn your heating back on for the first time in autumn, as pumps can seize after being inactive throughout the summer.
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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