Low
S.15 on Vaillant Combi Compact 282EB

Your boiler is briefly keeping the pump and fan running to cool itself down after you have finished using the hot water.

Monitor it

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.

What the manual says

Manufacturer manual

DHW mode pump and fan overrun

From this model's manual
Verified against the Vaillant Combi Compact 282eb installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required as this is a normal operating status and not a fault.Wait a few minutes for the status code to change once the cooling cycle is complete.If the code never disappears, try resetting the boiler once.

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