Any time the airflow through an air conditioner is restricted the cooling system becomes affected. If taken to extremes the critical pressure-temperature balance of the cooling coil can be changed. If they drop too low the cooling coils surface temperature can drop below the dew point temperature of the room. When this happens the cooling coil will begin to operate as a refrigerator rather than an air conditioner. Rather than simply cooling the air it will collect and hold moisture. The moisture will freeze onto the cooling coil where it will appear as ice.
The primary job of an air conditioner is to de-humidify, not refrigerate, the room air. By removing the moisture from the room air it gives us a feeling of comfort. To do this though the temperature of the cooling coil must always be higher than the room’s dew point. If it is allowed to drop below the dew point the air conditioner will start to produce ice.
Company Resource: Air Source Heat Pump, Modular Air Conditioner
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