Common Air Conditioning Problems

Size of System

Oversized System: Bigger is not definitely not better. Oversized systems are prone to short cycling or turn on and off frequently and will reduce the life expectancy of the equipment. In addition, the ideal comfort level of the home will not be obtained because of dramatic changes in the temperature of the house as the house cools and heats rapidly. Finally, an oversized system will not properly dehumidify the air due to the short cycling, which can cause swamp-like conditions (cool but humid air).

Maintenance

Air conditioning systems should be serviced every year at the beginning of the cooling season. The exterior compressor/condenser units should be kept clean and free of all leaves and debris; they should never be covered or otherwise boxed-in, and shrubs and hedges should be cut back. All of the above restricts the free flow of air, which reduces the gas-to-liquid process and overall efficiency of the system. In extreme cases, this may cause damage to the compressor. Window units should be removed during the heating system, because they allow an excessive amount of heat loss when they are left in.

Evaporator Coil

Though usually made of copper, these coils can corrode as the system ages.

Compressor

The compressor is the main mechanical component of a central air conditioning system, which both compresses the freon and moves the freon through the system. In general, air conditioning compressors should not be operated in temperatures below 60 degrees F, or damage may result.