Low
SEr on Vaillant ecoTEC exclusive

Your boiler is simply reminding you that it is time for its scheduled annual safety check and service.

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

Maintenance indicator: service signal shown alternately with the current pressure after expiry of the set number of burner operating hours.

Engineer required

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

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