Low
d.45 on Vaillant ecoTEC plus System

Your boiler is displaying a status code indicating that a internal heating temperature setting has been adjusted to a value outside of its normal operating range.

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

Value for the base point of the heating curve: 15 to 30

Engineer required

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

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