My A/c is blowing hotter and hotter air, l bought 2 cans with freon but l do not know how to charge them, l sow beside the engine 2 aluminum tubes, one of them had a H on it and the other one had an L on it, witch one do l have to put the freon in?

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you charge from the Low side ''L it only uses about 1 pound of r134

You have to repair the leak first but if you must putting R134 into the side marked L for low side there is a green label under the hood your entire system takes 1.43 lbs to charge. So if you do not know how much is left in the system stop at one 12 oz can. Best left to professional to show you the oily low or high side hose from the compressor Oily residue indicates a leak and the oil will have green DYE in it. Fix the leak and charge the system only once.