Low
P.008 on Vaillant ecoTEC plus Combi

Your boiler has detected that the internal water system is currently being refilled or is still filling up, so it is temporarily paused to ensure the system pressure is correct.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Fillingofproductwith water

From this model's manual
Verified against the Vaillant Ecotec Plus installation & service manual, page 91.
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

Ensure the filling loop valves are fully closed after the system has been topped up.Check your pressure gauge to ensure the needle is within the green zone (usually 1.0 to 1.5 bar).Wait a few minutes for the boiler to register the correct pressure and clear the status code automatically.

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