Low
d.02 on Vaillant ecoFIT Pure 412

Your boiler is taking a short rest between heating cycles to protect its internal parts, which is a normal part of its operation.

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

Burner anti-cycling time in heating mode

Engineer required

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

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful