Refrigerator and control method thereof

The invention provides a control method of a refrigerator. The control method comprises the following steps: judging whether an ice-making unit supplies water abnormally or not; when the condition that the ice-making unit supplies water abnormally is determined, judging whether the continuous abnormal water supply frequency of the ice-making unit reaches the preset frequency or not and ensuring the preset frequency to be larger than 1; and when the continuous abnormal water supply frequency of the ice-making unit reaches the preset frequency, generating an alarming signal. Therefore, whether the ice-making unit supplies water abnormally or not is judged accurately, and the abnormal water supply misjudgment probability is reduced; and the real reason that ice cannot be made is judged rapidly and accurately by after-sales service personnel, the after-sales service and maintenance efficiency is improved, and the after-sales maintenance cost is reduced. On the other hand, the invention further provides the refrig