BoilerFaultCodesTechnical description
Fault on Pump or Low System Pressure
What causes this fault?
This fault occurs when the boiler detects that there isn't enough water pressure to safely operate or that water isn't being pushed through the internal heat exchanger. The most common reason is a simple drop in system pressure, but it can also be triggered if the pump has seized or failed due to age. If the water cannot move, the boiler shuts down to prevent the internal components from overheating.
This issue is frequently seen in autumn when the heating is turned on for the first time after summer, as pump components can seize during long periods of inactivity.
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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