Why is my side by side refrigerator not cooling properly while the freezer is working fine?

There could be several reasons why your side by side refrigerator is not cooling properly while the freezer is working fine. One common issue is a malfunctioning evaporator fan, which circulates cold air from the freezer to the refrigerator section. Another possibility is a blocked air vent between the freezer and refrigerator compartments. Additionally, a faulty temperature control thermostat or a problem with the condenser coils could also be causing the issue. It is recommended to consult a professional technician to diagnose and fix the problem.