Medium
D.015 on Vaillant ecoTEC Pro / ecoTEC Plus System

Your boiler is reporting a communication issue regarding the speed at which your internal water pump is running.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Pumpspeedactualvalue

From this model's manual
Verified against the Vaillant Ecotec Pro Ecotec Plus System installation & service manual, page 55.
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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