Car Air Conditioning: Maintenance And How To Use It

To understand how to use car air conditioning, you need to know how the car compressor works. It is also necessary to understand how the filter and the refrigerant fluid work.

Before describing the operation in detail, let’s explain a basic principle: when a liquid turns into a gas it absorbs heat, while when gas becomes liquid (condensation) it releases heat. As a result, the car’s climate control system does not produce cold air but extracts hot air from the passenger compartment.

We will also talk to you about car air conditioning maintenance at Chicago Auto Repair with the main precautions for using the car air conditioner.

How car air conditioning works

The operation of the automobile air conditioning is simple. The warm air in the passenger compartment is cooled as soon as the evaporator is activated, inside which a cold liquid circulates.

This fluid is circulated by the compressor which works in a similar way to a pump. From the compressor, the fluid passes to the condenser inside which it liquefies. Afterward, it is placed in a tank that will retain moisture and impurities. At this point, the vaporized liquid cools the air.

Car air conditioner: how to best use it, tips

The car air conditioner can be used in any season of the year but the air conditioner is used especially in summer.

To make the most of it, you need to do this:

  • get on board the car;
  • open the doors and lower the windows for a few minutes to help change the air;
  • keep the air conditioning on with recycling for about 5 minutes.

This way, you can breathe fresh air for as long as you need.

Avoid the igloo or freezer effect while traveling. Excessive changes in temperature can be harmful to health. The ideal temperature in the passenger compartment is 22-23 ° C while an adequate balance between external and internal temperatures is 5-6 ° C.

To avoid sudden changes in temperature, in the last minutes of the journey you would do well to turn off the system by activating the internal fan. In this way, the body will get used to the higher external temperature better.

Do not point the air vents at you because you could risk muscle contractures or respiratory tract problems. Correctly orient the air jet upwards.

Air conditioning for cars: maintenance

For the correct maintenance of car air conditioners, certain rules must be respected, starting from recharging the car air conditioning, this will allow us to have an always efficient the system, therefore:

  • periodically recharge the refrigerant gas present in the air conditioning circuit otherwise there is a risk of a drop in efficiency;
  • any do-it-yourself intervention is not recommended, so it is important to contact a specialized workshop that meets precise safety standards, specific VDA and TÜV regulations for charging equipment;
  • the car air conditioning system must be checked periodically: every 2 years or every 60,000 kilometers;

During the check-up phase, it is essential to check for any gas leaks. If necessary, the filter (including the pollen filter ) must be replaced to avoid the risk that impurities and humidity are not filtered adequately or that may, in the long run, jam the expansion valve.

Do you need a check on your car’s air conditioning system? If your car breaks down in the middle of the the road you can get the car towing service anywhere at your ease.

Car air conditioning system: stop unpleasant odors

To avoid the onset of bad smells when the car air conditioner is turned on, just take a few precautions and follow a few simple suggestions, periodically carrying out maintenance on the air conditioning system.

A good rule of thumb, to avoid stagnation of germs and bacteria, is to run the heating to the maximum before turning off the engine: this action is very effective in preventing the formation of mold in the evaporator because hot air is useful for dry any parts that may have been moistened inside the system.

If, on the other hand, you already feel bad smells when starting the car air conditioning, it is useful, before turning off the engine, turn off the car air conditioning and start the fan at maximum power: this prevents condensation from stagnating. When the problem is in the condensate drain, an effective method to free it is to use compressed air and immediately afterward disinfect and sanitize the system circuits to remove any residues.


In this case, it is still advisable to remove and replace the air conditioner filter. When the problem is not solved in this way then it means that it has gone on for too long, so it is now too late to try DIY interventions. It will be necessary to intervene directly on the evaporator, which must be mechanically disassembled and cleaned from mold and germs.