Your boiler is taking a brief programmed break to prevent it from turning on and off too quickly while heating your hot water.

DHW anti-cycling time. The anti-cycling time for domestic hot water mode is activated.

What causes this fault?

This status occurs because the boiler has reached its target temperature and needs to pause briefly before firing up again. It is a protective measure designed to prevent the burner from turning on and off too frequently, which protects internal components from unnecessary wear and tear. Once the brief cooling period ends or the water temperature drops slightly, the boiler will resume normal operation automatically.