Low
P.00 on Vaillant ecoTEC exclusive System

Your boiler is currently running an automated self-cleaning cycle to remove air bubbles from the pipes and is not experiencing a fault.

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

Purging check programme: The internal pump is cyclically actuated. The heating circuit and hot water circuit are purged adaptively by automatically switching the circuits via the automatic air vent

From this model's manual
Verified against the Vaillant Ecotec Exclusive Combi installation & service manual, page 18.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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