Low
d.05 on Vaillant ecoTEC plus System

Your boiler is simply displaying a live status update showing the temperature it is currently aiming to reach for your radiators.

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

Determined heating flow set target temperature: Current value

Engineer required

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

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