The evaporator is a component of a structure’s HVAC system. The evaporator works the opposite of a condenser in that it converts refrigerant liquid into gas, which absorbs heat from the air in the device. When this liquid refrigerant reaches the evaporator the pressure is reduced, the heat content is dissipated and makes the area cool. This process causes the refrigerant to absorb heat from warm air and helps it to reach its low boiling point fast. The refrigerant then vaporizes allowing absorbing the maximum amount of heat. From there, the heat is carried by the refrigerant from the evaporation through a hose or line to the compressor. The whole cycle is then repeated as needed, depending on the temperature demand set on the thermostat.
The process of cooling the home with an AC system also de-humidifies the air. An evaporator coil should have both a primary condensate drain line from the evaporator box to a waste line and an emergency catch pan and drain line to the exterior or basement sump.
A professional HVAC can evaluate a home’s heating and cooling system for potential problems. Some of the biggest problems with evaporators are starved evaporator coils where not enough refrigerant has been supplied through the entire coil length. A flooded evaporator is the opposite of the starved coil when too much refrigerant is passed through the coils, which results in unexpanded liquid passing into the compressor. Both can be repaired by a HVAC professional and will ensure that a system is working at its operational state at all times.