Low superheat

**Low superheat**

Superheat refers to the temperature of a vapor above its boiling point at a given pressure. In HVAC and refrigeration systems, “low superheat” indicates that the refrigerant vapor leaving the evaporator is only slightly warmer than its saturation temperature. This condition can suggest that the evaporator is nearly fully saturated with liquid refrigerant, which may improve cooling efficiency but also risks liquid floodback to the compressor if superheat is too low. Understanding and monitoring low superheat is important for optimizing system performance, ensuring proper refrigerant charge, and protecting equipment from damage.