How to Add Freon to a Car Air Conditioner

Freon is added to the air conditioning unit of a car when it stops working to its fullest. In order to bring it to the previous condition, we use Freon, and this is something which is pretty effective for the air conditioner. Most of you would take the car to a car mechanic if it encounters some problem. But it has to be understood that there are a lot of things that we can do ourselves, and using Freon in the air conditioning unit of our car is a pretty simple thing that we should try to do ourselves.

Things you’ll need:

  • Freon (can be bought in cans)
  • Your cool car
  • Eye protection materials
  • Hand gloves

Adding Freon


  • First of all you should buy a can of Freon. You can get it from an automobile shop. Some hardware shops also sell it. So, if you don’t get it at one place, look for it at the other place as well. You should not use Freon if you are using a car that was manufactured before 1993, or which is using R-12 in its air conditioning unit. That’s because it is illegal to do so ourselves – in that case, only a certified mechanic is allowed to use it.
  • Next, you should find the recharging hoses – there will be shorter hose as well as longer ones. You should connect the shorter hose to the Freon.
  • There will be a valve in the Freon can. It should be kept opened for a few seconds. Doing so, the air from the system is likely to be purged. After that you can close the valve that you have just opened and then tighten the hose connection.
  • It’s time to start your engine. Hey, but it’s not yet over. When you switch ON the AC, make sure it is on high. For the low side manifold, you should slowly open the valve. This is done in order to let the refrigerant enter the system. You should be holding the Freon can upright only.
  • Make sure the can is empty and after that, from the low side fitting, you should remove the hose. After doing that the right way, close the valve. Utmost care should be taken while removing the can from the system.

So that’s it. This is how you should add Freon if you think the air conditioning system in your car is not working.

Further Readings:

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