BoilerFaultCodesTechnical description
Heating mode: Pump pre-run. The pump prerun for heating mode is activated.
What causes this fault?
This status occurs when the boiler receives a signal to provide heat and begins circulating water through the system before ignition. It is a normal safety and efficiency feature designed to clear any residual heat and ensure the pump is functioning correctly before the burner fires. Your boiler has not broken down; it is simply preparing the internal components for the heating cycle.
This code is most frequently seen in autumn and winter when the central heating is first being used regularly after the summer break.
DIY fix possible
No action is required; this is a normal operational status message.Wait approximately 20 to 60 seconds for the code to change as the boiler fires up.Ensure your thermostat is turned up if the boiler remains in this stage for a long period.