My Ariston margherita was clicking so I tried to remove the filter to unblock which I have done before, but this time the cover was stuck. So I unscrewed the screws that attach the pump (I think thats what it is) and it seemed to fall of. At this point i realisized it was uneccessary and i proceeded to prise off the cover. have now screwed the pump back in place and fitted a new cover but its not working, its making a whirring noise but not starting the cycle. Is there anything I can do now