BoilerFaultCodesYour boiler is briefly keeping its internal parts running to safely cool down after you have finished using your hot 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: DHW mode: Pump/fan overrun. The pump/fan overrun for domestic hot water mode is activated.
What causes this fault?
This status occurs because the internal components of your boiler become very hot while heating your shower or taps. The boiler needs to keep the pump and fan running for a short period to move that heat away and prevent the system from overheating. It is a normal part of the boiler's operation and ensures the longevity of the internal parts.
DIY fix possible
No action is required; this is a normal operating status and not a fault.Wait a few minutes for the boiler to complete the cooling cycle.Check that your hot water taps are fully closed.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like S.25 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.