good afternoon 1979 ,,,,,,, comments that the refrigerator has 2 compressors ??? and if you can upload some photos to observe and be able to give our opinion, ,,,,,,,, 1st you have to look for the manual there the manufacturer reflects the causes and most common failures ,,,,, there can be several situations ,,, , 1st that the fan is not working and the cold does not enter the conservative ,,,,,,,, 2nd that the ambient and freezing sensors are damaged ......... and 3rd in case it has 2 compressor, check the one with the fault, if there is a lack of gas, check if the filter and capillary are partially clogged ,,,,,,,,,,, if you have no idea it is preferable that you look for a technician who checks you all and for saving you money you can have a personal accident and damage the equipment ,,,,, I do not doubt its capacity but these tests are delicate ,,,,,,,,,,,,,,,,, value the response