The new large Bosch KGN49XI30 refrigerator under warranty (width 70cm) makes strange sounds from the beginning, which are a nightmare at night (kitchenette). The refrigerator can murmur, whisper, whistle, etc. I called the service, they warned me that the call would be unjustified and that these refrigerators are on a new factor that already has it. Is it true or is there a way? Maybe not enough of this factor?