It sounds as though the fan works but the cooling/compressor unit is not kicking in (louder noise when it does).
If that's the case, it could be a faulty motor, or a faulty capacitor(condenser) or (unlikely) the refrigeration unit has become degassed.
Try looking up replacing a capacitor online - but be careful to discharge it properly and safely if you do. You can look that up too. DGH
David in Herefordshire
November 2022