Start with the easiest things to check: The door gasket of your fridge may be defect, check it pls Check the mode of the thermostate https://abc-repair.com/ Look at the backside of the fridge, the condenser coils and clean up the debris Does the refrigerator make any noise in the upper part? - evaporator fan Noise in the lower part - compressor fan. Any way something is wrong with the air flow