You only need to open the can tap 3 to 4 turns and you will feel the top of the tool getting cooler. You open the can tap so freon starts to travel from the can to the suction side. You now start the car with the AC system on high. The hose tool you bought is made so you can only hook to the low side as the high side and low side fittings are different sizes and shapes for SAFETY'S SAKE. The freon is added on the LOW PRESSURE SIDE ONLY. You will only work on the LOW PRESSURE SIDE. You may of noticed the system has a high pressure side and a low pressure side-VERY IMPORTANT. Then from there the low pressure cold gas goes back into the compressor to start the cycle all over again.
It then leaves the evaporator and goes through hoses to the accumulator / drier which is just a big tank to catch any liquid that might of snuck out with the gas. Once it travels into the evaporator it is now a low pressure cold gas again and not a liquid. The liquid is still at high pressure and very warm and stays that way until it is used to make the evaporator cold. The hot freon after being cooled turns from a hot gas to a semi hot liquid. That is so cool air is pulled through the condenser to cool the hot compressed freon. You might of noticed your fan runs a lot when the air conditioning is on. Next the high pressure gas goes to a condenser that sits infront of your radiator. The basic AC system has a pump or compressor that pumps a low pressure gas to a high pressure. Note that there are parts you can't see and we won't address those as they are not necessary to know about to charge the system. Now check out the pictures to see what the basic parts of an AC system are. There are conversion kits but that is beyond the scope of this demonstration. If it says 12 this Instructable does not apply to you. There should be a tag on the radiator cover cowl or somewhere under the hood that tells you. An AC system in need of some freon.įirst see what freon your vehicle uses. A thermometer to see the temp drop from the dash vents or cold air out. If it is cool but not as cold as it was buy 1 can 3. Freon- probably 2 cans if your system is barely cold. The adapter to connect from the freon can to your freon SUCTION SIDE of the AC system. IF YOU DECIDE TO DO IT YOU DO SO AT YOUR OWN RISK.
STEP2 AIR DOC HOW TO
THIS IS JUST A DEMONSTRATION OF HOW TO DO IT. I ASSUME NO LIABILITY FOR YOUR TRYING THIS. THIS CAN BE DANGEROUS AND THERE IS POTENTIAL FOR INJURY.
If after reading this instructable you feel unsure about doing this then you should not be doing it. 4.Wear safety goggles at all times incase a hose blows or something goes wrong and freon is sprayed on your face. Freon if sprayed as a liquid on your body parts will freeze them instantly- FROSTBITE 3.Don't release freon into the atmosphere. You can easily loose your fingers if you put them where they don't belong! 2. Since your car engine is running to charge the AC system there are moving belts and pulleys,fan(s) and very hot parts. First a few Rules you need to always follow. Second to equip you to make a repair to your AC system if it just needs a Freon charge to bring it back to good working order.
First to help people to understand and be safe. I decided I would do this instructable for the following 2 reasons. I thought that was a good thing because you can be severely injured and or do $$ of damage to the system your working on. When R-12 was around I was licensed to buy and use it. Every automobile parts store I walk in these days has freon for sale.
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