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You yourself cant unless you are licensed to do so...
WRONG ANSWER: Anyone can do it if they know how. All you need is the gauges and the proper freon your system is using. My advise to you is be sure you know what you're doing or you can really screw your system up good. The reason someone told you that you need to be certified is in order to purchase the freon you have to have your certification card. There are ways of getting around that though. I have been working on my own HVAC all my life and I'm not certified. I do vehicles at work and homes. I guess this person thinks the air conditioning cops will come and get you if you repair your own system. It's not hard at all just be sure to read up on it first. Good luck. With more people doing their own work on HVAC the rip-off prices will come to a stop.
second guy is on the money. in fact 80 % of problems are electrical and pertain not at all to the refrigeration system and therefore don t require epa refrigeration license
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Why can't you add freon to an auto's AC?
Because they no longer use freon.
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You add freon to the low side fitting,top front,on the ac compressor
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You call a licensed contractor and have them check your system. If they determine that it needs freon, they can add the right punt.
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Add freon
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R134a
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R134a
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R12-if it has ac of course.
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Freon is added through the ac low pressure port. The port is located on the aluminum pipe on the ac line.
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Google heating and air, followed by the city and state you live in. This should bring up several ac companies in your area.
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