Superheat is the measured value of the difference between the actual temperature of a refrigerant vapor and the saturation temperature of that refrigerant at the same pressure. Another way to describe it is the temperature of a vapor above it’s boiling temperature at a given pressure. Ensuring proper superheat in HVAC and refrigeration systems is very important. Correct superheat ensures that the compressor is not being flooded. Flooding occurs when liquid refrigerant makes its way back to the compressor. This can cause lubrication issues and could damage the compressor.