Is Your AC Losing its Cool?

November 6, 2017


We know air conditioning is one of the most important concepts to your comfort and peace of mind.

St. Louis AC Repair

If your AC is not cooling properly, the reason could be as simple as dirty coils. Clean coils are extremely important for the proper functioning of an air conditioning system. Even if 1/100th of an inch of dust collects on the AC’s condenser coil, it loses 5% of its efficiency. Our St. Louis HVAC technicians explain how dirty coils could be causing your AC to under-perform.

The Importance of Air Conditioning Coils

There are two AC coils which are very important for the proper operation of the system. The evaporator coil is responsible for absorbing the heat and humidity from the space. The condenser coil releases the heat absorbed from the inner space, outside the building.

The condenser coil is located in the outside unit and is exposed to the adverse weather, soot, dirt and other trash outside. Dust can easily accumulate on it. This can reduce its capacity to work properly.

The Way in Which an Air Conditioner Works

In order to understand how dirty coils reduce the cooling ability of the AC, it is advisable to know how an air conditioner works.

First of all, the cold refrigerant passes through the evaporator coil. The system’s blower transfers the warm air from the room over the evaporator coil. The refrigerant present in the coil absorbs the heat from the air. The air which has been cooled in this way is blown through the ducts into the living space.

After that, the refrigerant moves to the condenser coil in the outdoor unit. This coil removes the heat from the refrigerant. The outdoor condenser unit blows air over the coils and releases the heat.

Problems That May Occur if the Coils are Not Clean

If the coils are covered with a layer of dirt the refrigerant inside them cannot absorb and release the heat from the air which is passed over them. The dirt obstructs the transfer of heat. So the efficiency of the cooling cycles diminishes. The unit has to work harder and longer to achieve the required cooling level.

If there is a high degree of sulfur in the soot the condenser’s tubes get corroded which ultimately leads to the breakdown of the system.
The air quality may diminish and warm and humid air may circulate in the building. Mildew, mold and bacteria may grow due to excessive humidity.

Some of the other problems include:

  • Airflow will be hindered.
  • The levels of refrigerant may be inconsistent.
  • There may be ice formation on the evaporator coils.
  • The compressor may be overheated.
  • Energy bills may increase due to the inefficient operation of the system.

It is recommended that the AC coils should be cleaned at least once a year.

St. Louis AC Maintenance

At Scott-Lee Heating Company, we know air conditioning is one of the most important concepts to your comfort and peace of mind. Whether you need to repair or replace your air conditioning system, you can count on us to be there when you need us, charge you a fair and honest price, and stand behind our work 100%.

Call us today at (314) 200-0788 or fill out our online contact form.

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