Diagnosing problems with an air conditioning system can be very complicated. But going distances in midst of a hot summer day with the a/c not cooling enough is much more difficult and uncomfortable.


Desperately, you only want to get that cool air back into it and improve you travel. But it is quite impossible to reverse the things without understanding what actually is going wrong with it. Before thinking of getting the chilled air back, you should think about where the problem is?


There can be several reasons of why your a/c is not cooling your car as it used to do on regular days. Lack of precious cold air may be due to the following reasons:


  • Freon leak caused by a failed o-ring, seal, hose or component
  • Clogged expansion tube or refrigerant charging hose
  • Failed compressor or compressor clutch
  • Failed blower motor or blower motor resistor
  • Damaged or failed condenser or evaporator
  • Vacuum leaks
  • Failed switch, fuse, relay, control module, blend door or solenoid


It may not be the case of hot air all the time, rather you a/c can start up with quite good cold air but gradually it becomes hot. This may be the case due to


  • The clogged expansion valve
  • Faulty compressor clutch
  • The blown fuse scenario


Although it may not be possible for you deal with all of them on your own, but you can always get a fair idea of what is going wrong and then can approach the mechanic. There are a few things that you can also take care of and there is no need to visit a mechanic. Here is list of things you con do to get the cool air back into you’re a/c and your car and make your life easier:


Recharge your refrigerant: The most common cause of an air conditioner not getting cold enough is that it needs to be recharged. You can recharge your refrigerant by yourself, but if you’re not comfortable doing it, let a mechanic do it for you and then you can get your cold air flowing again pretty quickly.


Check the Blend air door: There is a small hatch inside your car’s ventilation system called the blend air door. When you turn your environmental system from heat to cold, the door should change to drawing in cold air. If it doesn’t change, it will still be drawing heat from the engine and blowing it on you!


Heal it for possible Freon leaks: Freon is the chemical that cools the air, so if there’s a leak in the system, it will eventually run low or run out. The new a/c systems are very sensitive. They require a specific amount of Freon, measured in pounds, to operate correctly.


The proper way to check the system for the correct volume of Freon is with a charging machine. This device will first remove all Freon form the system then input the correct amount for proper operation.

Try resolving possible issues with compressor: When you think about resolving an air conditioning issue, it is easiest when you start with the compressor. This problem can occur due to a variety of conditions. Failure can occur when there’s an electrical fault in your compressor’s circuit or clutch, Freon can be low or the vehicle can be overheating.

Today’s cars are computer controlled and the first system that is turned off when the computer senses an engine problem is the a/c system. Usually, the malfunctioning part has to be replaced by a qualified mechanic.

Check the fan properly: If you feel that the sir coming out is cool but the amount is significantly low in order to maintain the temperature inside your car, then you a/c’s fan may have stopped working. It may be as simple as changing a wire, or you may need a new fan unit. Again, this isn’t something you can really change yourself, especially since it may require taking apart your car’s dashboard to reach all of the components.

Dealing with leaks: Leaks are the most common problem associated with the air conditioning system. If pressure is low, then there may be a leak. Check around all fittings to verify that they are all secure. Have a look at the hose manifolds on the compressor. Check the front seal and the o-rings sealing the pressure switches on the back of some compressors.


Check where the hoses are crimped onto the fittings, the Schrader Valves, and pin holes in the condenser. These were all the potential places for a leakage.


The air conditioning system of your vehicle today is a bit complicated. While there are some simple and relatively easy fixes like filling up the Freon, and a few others, there are always some internal problems you yourself can’t reach. For all these case it is recommended to have a well qualified, trained and good mechanic to take care of things.


Not only it is complicated, the a/c in you car is that much sophisticated also. There is nothing worse than being struck in the traffic jam on a hot day in summer and above that the a/c system of your car is not working.


Hard to imagine, right! It is better to take care and just in case you sense some problem, just check it yourself and get it fixed as soon as possible from a mechanic if you cannot do it on your own.