BoilerFaultCodesYour boiler is continuing to run the pump for a short period to move heat away from the system after it has finished heating your water.
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 time after warm start
What causes this fault?
This occurs when the boiler has finished pre-heating its internal components and needs to circulate water to prevent heat from building up too much in one spot. It is a normal safety function designed to protect the internal heat exchanger from overheating after the burner switches off. Think of it as the boiler taking a 'cool down' breath to ensure everything remains at a stable temperature.
DIY fix possible
Check that your radiator valves are open to allow water to circulateMonitor the boiler for a few minutes as this is often a normal operational status rather than a faultEnsure there is no air trapped in the system by bleeding a radiator
Find a Gas Safe engineer
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A boiler cover plan would cover faults like D.72 — no call-out fees, no surprises.
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