Automotive air conditioning systems were first introduced in 1940. Today’s automotive air conditioning system doesn’t only cool the interior of the vehicle, but it also cleans and dehumidifies the air allowing better air quality in the vehicle’s cabin or seating area.
There are three basic components to any automotive air conditioning system:
- Compressor – The compressor is in the engine compartment and is considered the heart, (or circulatory system) of the air conditioning system. The compressor pumps the refrigerant through the entire A/C system.
- Condenser – This component is typically located under the hood in the front of your vehicle behind the grille. The condenser removes heat from the refrigerant and cools down the high-pressure gasses.
- Evaporator – This usually located in the dash area inside the vehicle. The evaporator removes the heat from the air inside the vehicle.
Cars which are manufactured in 1995 or later have been equipped with air conditioning systems which are,
“ozone-friendly”. These systems do not contain CFCs, are nontoxic and nonflammable.
Prior to 1995, automotive air conditioners came with R-12 refrigerant, most commonly known as the Dupont product named Freon.
Common Problems
The most common complaint about automotive air conditioners, particularly R-134 systems, is an intermittent odor which permeates from the A/C vents. Auto manufacturers have concluded that accumulated bacteria and fungus in the evaporator core likely causes the odor. Because the air conditioning system is loaded with moisture, it attracts microbes. An easy way to help eliminate the odor is to shut off the A/C unit at least one mile before you reach your destination. This allows enough time for the evaporator to dry out, essentially doing away with the moisture and microbes that cause odor. If this does not work, there is a fungicide to treat the evaporator core which helps to eliminate the problem.
Caring For Your A/C System
- Make sure the condenser is always clear from debris and obstruction.
- Replace the cabin air filter once every three months will help to maintain the performance of your automotive air conditioning system.
- Check the A/C drive belt on a regular basis.
At Mark Martin’s Auto World we check and visually inspect these items free of charge every time you come in for service.