Worcester Bosch 37CDI Vibrating?

Hi All,

My Worcester Bosch 37CDI is not displaying an error code but tonight has started to vibrate extreamly hard and loud, the first time it did it I checked the display but it was just counting down, then it did it again a few seconds/minutes later so I turned it off and on again but again it did it after a few seconds so I have turned it off again. Can anyone please advise of the possible issue? Thanks