An evaporator coil operates as an important part of an air conditioning or heat pump system and helps supply cool air to the home. Working with refrigerant and a blower motor or fan, the evaporator coil helps remove heat energy from the air, which makes the room feel cooler.
Certain evaporator coils come built inside the air handler or packaged unit, while others come encased in their own cabinet. A cased coil enclosed in its own cabinet can mount near the air handler. They typically mount above or below the air handler depending on the direction of the airflow.
To maintain an evaporator coil, change HVAC filters regularly to keep up airflow and to keep the coil surfaces free of dirt. Contact an HVAC professional for cleaning as well as maintaining the refrigerant level. Maintaining airflow and refrigerant levels can help avoid a frozen evaporator coil.