Location for adding freon

there are too levels for refrigerant that affect the ac compressor . one is too low which you see and the other is too much. both control pressure switches tat work the ac clutch. IT is best to have a refrigerator /air conditioner mechanic add the gas as they will check out the system for leaks which you have

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Ok my friend there should be a aluminum pipe that runs in front of your engine, it'll have a black cap almost like the ones found on tires. http://www.google.ca/url?sa=t&source=web&cd=1&ved=0CBYQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DERDsfRRMuow&rct=j&q=how%20to%20add%20freon%20to%20car%20air%20conditioner&ei=Pcc1ToLtGOnnsQK0sZmbCw&usg=AFQjCNEDHiFa1pEb3RAivjIpORq8Jv6xYA&cad=rja hope this helps

You have a leak somewhere in the ac system. I'd add some freon for now, but you need to get the leak fixed eventually. Just go get a can of freon and follow the directions. It's really easy

there are two lines high and low side you put the freon on the low side also check the back of the freon can

Low pressure switch or pressure sensor.

that means low refrigerant available and the low pressure switch is preventing the compressor from damaging itself. You will need freon added to the system which in not uncommon since mobile a/c systems normally leak a small amount each year and eventually need topped off to work properly. Either buy some freon from a parts store or find an independant repair shop that will agree to just add the freon necessay to make the system work again. Freon necessary on most systems ranges from 1 to 2 pounds and freon bought in bulk by all shops costs $3 a pound and labor to do this is about a half hour so look at their labor rate and add a reasonable profit for the freon and this is what it should cost. If this helps please reply cause that helps me and good luck

Yes

Adding freon will not correct the problem. If you need to add freon, you have a leak, and you have moisture in the system, the leak should be located, mositure removed, then freon added. But to answer your question. Open the hood on, the left side you will see a round object called a dryer, you will see two pipes coming from it, one at the top and one at the bottom. The smaller is the high side, the larger is the low side. Obtain a can of freon either R-22 or 134a with an adapter for installing the freon. Turn the engine on, turn the AC to high. Add the freon to the ac using the low side.

You need to add the freon on the low side which is usually indicated by a blue cap. The red cap is the high side port. Never add freon using the high side port. Typically if you are buying a guage set from your local auto parts store, it will only attach to the low side service port because they are diffent types of connections. Another easy way to tell is to turn your AC on and feel the lines that the ports are attached to. The low side should be cold/cool and the high side will be hot.