BoilerFaultCodesYour boiler is briefly running the internal pump after the heating has switched off to cool down the internal components, which is a normal operation and typically not a fault.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: pump overrun
What causes this fault?
This status appears when the boiler's internal computer determines that the heat exchanger is still very hot after a heating or hot water cycle. The pump continues to circulate water briefly to dissipate this residual heat and protect the internal components from overheating. Once the temperature drops to a safe level, the pump will stop and the display will return to normal.
DIY fix possible
Wait 5-10 minutes for the cycle to complete naturallyEnsure at least one radiator valve (bypass) is fully openCheck that your room thermostat is turned down
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