While the exterior sides and the metal cabinet frame of a modern residential refrigerator can frequently feel quite warm or even hot to the touch during normal operation, the interior storage compartments should always feel cold. The warmth on the outer perimeter is completely intentional; manufacturers run hot liquid refrigerant lines through the front cabinet frame and side walls to prevent moisture and condensation from forming on the metal skin in humid kitchens. However, if the compressor housing compartment located behind the bottom rear service panel feels dangerously scorching hot while interior compartments are warming up, it indicates an overheating problem. You can troubleshoot heat sources easily by checking condenser coils. You can verify normal operation when warm exterior cabinet walls are accompanied by properly chilled interior food compartments and clean, dust-free coils.
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