I have a beko fridge freezer that has suddenly (in the last 2 hours) started making a loud humming/buzzing sound. Its usually a quiet hum. Im not sure of the model number but it is only around a year old. Its difficult to access the back of the unit as its fitted into a space but there is room for air to circulate. It has a temperature dial on the inside roof of the fridge which is always on minimum. The noise seems to be coming from the lower right hand side of the unit as you face the front. As its only just started making the noise I havent noticed if the freezer is defrostiong tho everything seems ok at the moment.