Low
d.33 on Vaillant ecoTEC Plus 625

Your boiler is displaying the current operating speed of the fan, which is a normal status message rather than a breakdown.

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

Fan speed target value: Current value in rpm. Fan speed=Display value x 100

Engineer required

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

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Related fault codes

F.32View →F.61View →

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