It is normal for the area behind a refrigerator to feel warm or even hot. Refrigerators work by removing heat from inside the fridge and expelling it outside through a cooling system. This process generates heat, which is why you may feel warmth behind the refrigerator.
The heat is dissipated from the condenser coils located at the back or bottom of the fridge. These coils release the heat as the refrigerant inside the fridge condenses and turns back into a liquid from its gaseous state.
Factors such as the model and efficiency of the refrigerator, ambient room temperature, and how often the fridge is opened and closed can influence the amount of heat produced. During hot weather or when the fridge is working harder to maintain the desired temperature, the heat dissipation may be more noticeable.
However, it's essential to ensure that the heat dissipation is not obstructed by items or debris around the refrigerator. Adequate airflow is crucial for the refrigerator's cooling system to function efficiently. If the heat becomes excessive or if you notice that the refrigerator is running constantly and struggling to maintain the temperature, it might be a sign of a problem with the cooling system or condenser coils, and you should consider having it checked by a qualified technician.