Is Your Air Conditioning Working Right?

Let’s imagine it’s August, the car is jammed with kids and luggage, and you’re finally on your way to the beach. Something is wrong.  Suddenly you realize that your car’s air conditioning system is on the fritz, and your family vacation really starts to heat up.  You’re thinking you should have had your air conditioning recharged or repaired before your vacation.

Automotive air conditioning systems were first introduced in 1940 to address customer demands for relief from unbearable heat.  These systems use refrigerant to cool the air and remove the heat from the car’s passenger compartment.  Air conditioning also cleans the air that enters the car, and removes excess moisture as it dehumidifies the air.

There are three basic components to any automotive air conditioner system:

  1. Compressor–Considered the heart of the air conditioning system, the compressor transfers and compresses refrigerant gas to let the heat out of the car.
  2. Condenser–removes heat from the refrigerant and cools down the high-pressure gasses.
  3. Evaporator–Acts as the heater core of the air conditioning system. The evaporator removes the heat from inside the car. The refrigerant then condenses the air and transforms it into water.

Cars manufactured in 1995 or later have been equipped with R-134A air conditioning system.  air conditioning systemThese ozone-friendly units do not contain CFCs, are nontoxic and nonflammable.

Prior to 1995, automotive air conditioners came with R-12 refrigerant, most commonly Freon.  During that time, a car owner experiencing air conditioner problems needed only to visit a local retailer to purchase a recharge kit.  With a can of Freon and basic knowledge, the average driver could easily repair his or her own air conditioning system.   When studies confirmed that R-12 systems were contributing to damaging the ozone layer, many countries including the United States banned their manufacture.

Common Problems

The most common complaint about automotive air conditioners, particularly R-134 systems, is the odor that permeates from the A/C vents.  Mechanics and car manufacturers have concluded that accumulated bacteria and fungus in the evaporator core likely cause the odor. Because the air conditioning system is loaded with moisture, it attracts microbes.  There are some expensive ways to overcome this problem – but there is also a very easy way that doesn’t cost you anything.

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.

Caring For Your A/C System

  • To keep it working efficiently, your automotive air conditioner must be recharged from time to time, depending on how often it is used. Consult your mechanic or your owner’s manual for information about system recharges.
  • Call your mechanic if you see water leaking from the A/C system’s condenser, as this can affect the refrigerant. Have the system repaired before refilling it.
  • Replacing the filter once every three months will help to maintain the performance of your automotive air conditioning system. This is where dust builds up when the A/C system is running.
  • Setting the gauge at one specific temperature will help it perform better. If you constantly switch from one temperature to another, your system has trouble adjusting.

Automotive air conditioners can be a driver’s best friend, whether you’re traveling across town or from coast to coast.  Keep your A/C unit well maintained, and it’s just one way you can keep your cool on the road.

Before you head off to your vacation, give Mark Martin’s Auto World a call to schedule a time for us to check your air conditioning to be sure your car or truck is ready for the heat. When the temperature goes up and you’re in traffic – you will be so glad you called us.

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