As the liquid refrigerant inside the evaporator coil converts to gas, heat from the indoor air is absorbed into the refrigerant, thus cooling the air as it passes over the coil. The indoor unit’s blower fan then pumps the chilled air back through the home’s ductwork out into the various living areas.
Old, clogged air filters are often to blame for AC problems like frozen coils. If the filter isn’t the problem; you could be low on refrigerant. Test this by feeling the larger of the two copper lines that go into the unit’s condenser. If it is moist and cold to the touch – your levels are good
The average lifespan of an air conditioning system is 10-15 years. Central air conditioner lifespan is one of the more important factors to consider when planning to invest in a replacement unit. If your unit is close to ten years old or older, you may want to consider replacing it instead of repairing it.
Depending on the system, an optimal time of 3 minutes is required before switching the system on. If the system is turned on without waiting for at least 3 minutes, the system can start with a pressure load. This pressure load prevents the system from cooling properly, which could affect the system in the long run
Install the indoor AC where there is no interruption in the airflow from the unit. In short, do not place it behind any furniture or a door that will obstruct the flow from the unit. An interrupted flow in a unit can affect the lifespan of the AC.