The Evaporator Coil Plays a Critical Role in Your AC System

You rely on your air conditioning system for relief from Marshville, NC’s hot and humid summers. Central air conditioning systems have two coils, each of which must be working properly in order for the unit to cool and dehumidify your home. Read on to find out what the evaporator coil does and why it’s important.

Types of Evaporator Coils

There are single-stage and two-stage evaporator coils. A single-stage coil allows for one level of air conditioning power, and it is standard in a central air conditioning system. A two-stage coil amplifies cooling and dehumidifying capacity. This coil type is in a split cooling system or zoned cooling system.

Evaporator Coil Functions

Chemical refrigerant enters the evaporating coil as a low-pressure, cold liquid. The warm air from your home passes through the AC filter and over the evaporator coil. As the warm air passes over the cold coil, moisture condenses from the air. The water collects in a drain pan and drains away through the condensate line. The cooler air enters the air handler and is blown through the vents of your home and into the living spaces. The warmed refrigerant, now a vapor, flows into the outdoor condenser coil and releases its heat. When the thermostat turns the system on again, the liquid flows back to the evaporating coil and starts a new cycle.

Common Problems of Evaporator Coils

A problem with the evaporating coil almost always causes an air conditioning malfunction. One of the most common problems is a dirty coil. An annual tune-up performed by a qualified AC technician includes cleaning the evaporating coil. Another possible problem is a refrigerant leak. If there’s not enough refrigerant flowing through the coil, it won’t absorb much heat from your home’s air. According to the Department of Energy, this lowers the system’s cooling capacity.

To learn more about the functioning of your AC system’s evaporator coil, take a look at Byrum Heating & AC, Inc.’s air conditioning services, or call us today.

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