Low
d.10 on Vaillant ecoTEC plus System

Your boiler is simply displaying the current operating status of its internal water pump to let you know if it is switched on or off.

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.

Technical description

Status of the internal pump in the heating circuit: off/on

Engineer required

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

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Related fault codes

d.11View →

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