BoilerFaultCodesYour boiler is briefly cooling itself down after providing hot water and should return to normal operation shortly.
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: Fan overrun. The fan overrun for domestic hot water mode is activated.
What causes this fault?
This status occurs because your boiler needs to purge excess heat after you have finished using your hot water taps. The fan continues to spin for a short period to safely move warm air out of the system and prevent internal components from overheating. It is a normal safety function rather than a breakdown.
DIY fix possible
Wait a few minutes for the status code to clear automaticallyEnsure your hot water taps are fully closedCheck if the code persists after a restart
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A boiler cover plan would cover faults like S.26 — no call-out fees, no surprises.
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